©2020 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2020 Biological and Chemical Oceanography Data Management Office.The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).
| Dataset Name | PI-Supplied Description | PI-Supplied Name |
|---|---|---|
| Three runs of six open system mesocosms run with 15N tracer addition from (oyster reef N2O emission project) | IRMS | |
| Results of measurements of the oxidation of 15N supplied as ammonia, urea, putrescine or nitrite in samples collected from continental shelf waters west of the Antarctic Peninsula on cruise LMG1801 from January to February 2018 | Gas Bench II coupled to a MAT 252 mass spectrometer | |
| 17D and isotopic ratios from R/V Yellowfin cruises to the San Pedro Ocean Time-series (SPOT) station in 2013 and 2014 | O2 and Ar isotope ratios were measured on a Thermofisher MAT 253 multicollector isotope ratio mass spectrometry at Woods Hole Oceanographic Institution. | Thermofisher MAT 253 multicollector isotope ratio mass spectrometry |
| Radiocarbon and 13C of sediment from cores collected pre- and post-hurricane Harvey at the Aransas and Anahuac National Wildlife Refuges, Texas on January 2018 | Used to measure delta13C. | Optima or Prism stable isotope mass spectrometer |
| Amino acid compound-specific isotope analysis (AA-CSIA) of tissue samples from four distinct trophic groups across the food web in the pelagic eastern tropical Pacific Ocean; samples collected on NOAA cruises from July to December 2006 | The d15N values of individual AAs were measured using an isotope ratio mass spectrometer (IRMS) (Delta PlusXP, Delta V Plus or MAT 253) interfaced with a gas chromatograph (Trace GC) through a GC-C III combustion furnace (980 degrees C), reduction furnace (650 degrees C), and liquid-N cold trap. | isotope ratio mass spectrometer (IRMS) |
| Bulk isotopic composition (d15N and d13C) of abyssal megafauna and macrofauna from Stations M and Aloha | Nitrogen isotope composition of amino acids was determined using an isotope ratio mass spectrometer (Thermo Scientific Delta V Plus) interfaced with a Thermo Finnigan GC-C III. | Thermo Scientific Delta V Plus |
| Bulk isotopic composition (d15N and d13C) of abyssal megafauna and macrofauna from Stations M and Aloha | Carbon isotope composition of amino acids was measured using a Thermo-Fisher Scientific MAT 253 isotope ratio mass spectrometer interfaced with a Trace Ultra GC-III via ConFlo IV. | Thermo-Fisher Scientific MAT 253 |
| Bulk isotopic composition (d15N and d13C) of abyssal megafauna and macrofauna from Stations M and Aloha | Bulk nitrogen and carbon isotopic composition were determined using an isotope ratio mass spectrometer (DeltaPlusXP or Delta-V-Advantage) coupled to an elemental analyzer (Costech Model 4010). | DeltaPlusXP or Delta-V-Advantage |
| Amino acid compound specific isotope analyses of abyssal deposit feeders, gut contents, and surrounding surface sediments collected on R/V Atlantis cruise AT42-10 and R/V Western Flyer Pulse 72 in the eastern North Pacific in 2019 | Bulk nitrogen and carbon isotopic composition were determined using an isotope ratio mass spectrometer (DeltaPlusXP or Delta-V-Advantage) coupled to an elemental analyzer (Costech Model 4010). | DeltaPlusXP or Delta-V-Advantage |
| Amino acid compound specific isotope analyses of abyssal deposit feeders, gut contents, and surrounding surface sediments collected on R/V Atlantis cruise AT42-10 and R/V Western Flyer Pulse 72 in the eastern North Pacific in 2019 | Nitrogen isotope composition of amino acids was determined using an isotope ratio mass spectrometer (Thermo Scientific Delta V Plus) interfaced with a Thermo Finnigan GC-C III. | Thermo Scientific Delta V Plus |
| Amino acid compound specific isotope analyses of abyssal deposit feeders, gut contents, and surrounding surface sediments collected on R/V Atlantis cruise AT42-10 and R/V Western Flyer Pulse 72 in the eastern North Pacific in 2019 | Carbon isotope composition of amino acids was measured using a Thermo-Fisher Scientific MAT 253 isotope ratio mass spectrometer interfaced with a Trace Ultra GC-III via ConFlo IV. | Thermo-Fisher Scientific MAT 253 |
| Nitrate plus nitrite isotopic compositions from Leg 1 of the Antarctic Circumnavigation Expedition (ACE) research cruise onboard the R/V Akademik Treshnikov from December 2016 to January 2017 | Nitrate+nitrite d15N and d18O was measured using a Thermo Delta V isotope ratio mass spectrometer. | Thermo Delta V isotope ratio mass spectrometer |
| Amino acid d13C values of diatoms, bacteria, and core M772-003-2 samples from the R/V Meteor (M77) in the Peruvian ocean margin from November to December 2008. | Used with PDZ Europa ANCA-GSL elemental analyzer | PDZ Europa 20-20 isotope ratio mass spectrometer |
| Amino acid d13C values of diatoms, bacteria, and core M772-003-2 samples from the R/V Meteor (M77) in the Peruvian ocean margin from November to December 2008. | Used with Thermo Trace GOLD GC | MAT 253 isotope ratio mass spectrometer (IRMS) |
| Amino acid d13C values of Thalassiosira weissflogii of ten different treatments; collections from R/V Meteor M77 in the Peruvian ocean margin from November to December 2008. | Used with PDZ Europa ANCA-GSL elemental analyzer | PDZ Europa 20-20 isotope ratio mass spectrometer |
| Amino acid d13C values of Thalassiosira weissflogii of ten different treatments; collections from R/V Meteor M77 in the Peruvian ocean margin from November to December 2008. | Used with Thermo Trace GOLD GC | MAT 253 isotope ratio mass spectrometer (IRMS) |
| Amino acid isotopes from mussels along the California margin from 2009-2013 (Amino Acid Sediment 15N project) | Used with Trace GC, interfaced via a ConFlo III and GCC device | hermoFinnigan Delta Plus XP isotope ratio mass spectrometer (Thermo Fisher Scientific) |
| Amino acid compound-specific isotope analysis (AA-CSIA) from tissue samples from pelagic fish from R/V Kilo Moana cruise KM1123 in the north and west of the island of O'ahu in 2011 | Individual amino acids were measured using an IRMS (Delta PlusXP, Delta V Plus or MAT 253) interfaced with a gas chromatograph (Trace GC). | isotope ratio mass spectrometer |
| Ammonia and urea-derived-N oxidation rates measured using 15N additions from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016 | Finnigan Delta Plus XP IRMS, Finnigan Delta Plus Advantage IRMS | |
| Macroalgal contribution to NH4+ removal in tidepools from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) | GV IsoPrime IRMS: Isotope determinations were made at U. Massachusetts Dartmouth using a GV IsoPrime IRMS, a custom purge-trap sample preparation system, and a CTC PAL autosampler. Reproducibility was better than ± 0.5‰. | IR Mass Spec |
| Measurements of nutrient flux and denitrification in clam aquaculture sediments. | IRMS | |
| Porewater geochemistry data for sediment samples that were included in the global seep survey conducted via Alvin dives from R/V Atlantis cruise AT15-40 in the Guaymas Basin in 2008 | The stable isotopic composition of methane and DIC was determined by GC/C/IRMS using a Hewlett Packard 5890 GC coupled to a Finnegan Mat 252 Isotope Ratio Mass Spectrometer (Hewlett Packard, Wilmington, DE, USA). | Isotope-ratio Mass Spectrometer |
| Sulfide data for sediment samples that were included in global seep survey from R/V Atlantis cruise AT15-40 and Alvin Dives in the Guaymas Basin in 2008 (Guaymas Basin Vents project, Guaymas Basin interactions project) | The stable isotopic composition of methane and DIC was determined by GC/C/IRMS using a Hewlett Packard 5890 GC coupled to a Finnegan Mat 252 Isotope Ratio Mass Spectrometer (Hewlett Packard, Wilmington, DE, USA). | Isotope-ratio Mass Spectrometer |
| Porewater geochemistry, including methane, CO2, sulfate, and sulfide from Guaymas Basin hydrothermal sediments collected on R/V Atlantis cruise AT15-56 in Nov-Dec 2009 | Stable isotopic compositions of the methane samples were measured via gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) on a Finnigan MAT 252 Isotope Ratio Mass Spectrometer, using a HP 5890 Series II Gas Chromatograph with a HP Plot Q column (30 m length, 0.32 mm ID, 20 um film thickness) and a 30 degree C isothermal temperature profile. Stable isotopic values and concentrations of DIC were analyzed via coupled GC (Hewlett Packard 5890) and Isotope Ratio Mass Spectrometer (Finnigan MAT 252). | Finnigan MAT 252 Isotope Ratio Mass Spectrometer |
| Atlantic sediment black carbon, total organic carbon, and stable carbon ratio (13C) values from samples collected using a multi-corer and box corer from multiple cruises throughout the Atlantic between 1994 and 2010 | Elementar Vario MICRO cube elemental analyzer coupled to an Isoprime100 isotope ratio-mass spectrometer (IR-MS) | Isoprime100 |
| Atlantic sediment black carbon, total organic carbon, and stable carbon ratio (13C) values from samples collected using a multi-corer and box corer from multiple cruises throughout the Atlantic between 1994 and 2010 | Carlo Erba elemental analyzer coupled to a GV Optima 588 system IR-MS | GV Optima 588 |
| Mean d15N of individual amino acids and bulk organic matter for five plankton size fractions | Used with PDZ Europa ANCA-GSL elemental analyzer | PDZ Europa 20-20 isotope ratio mass spectrometer |
| Mean d15N of individual amino acids and bulk organic matter for five plankton size fractions | Used with Thermo Trace GOLD GC | MAT 253 isotope ratio mass spectrometer (IRMS) |
| Data for Artemia fed to corals (Balanophyllia elegans) during a culture experiment conducted to evaluate the relationship between coral diet and tissue nitrogen isotopic ratio from 2019 to 2021 | Costech Elemental Analyzer Isotope Ratio Mass Spectrometer | |
| Experimental data (coral diet and tissue d15N) from a culture experiment with scleractinian cold-water coral Balanophyllia elegans collected at Friday Harbor, WA from experiments conducted between 2019 and 2020 | Costech Elemental Analyzer Isotope Ratio Mass Spectrometer | |
| Particulate data collected near Friday Harbor, WA between 2020 and 2021 as part of a study of cold-water coral Balanophyllia elegans diet and trophic position | Thermo Advantage continuous flow isotope ratio mass spectrometer | |
| Nitrogen isotope ratio data for coral tissue and skeleton samples of the scleractinian cold-water coral Balanophyllia elegans collected at Friday Harbor, WA from experiments conducted between 2019 and 2021 | Costech Elemental Analyzer Isotope Ratio Mass Spectrometer | |
| Isotopes from B. gymnorhiza mangroves in Palau during 2013 | Paired with a Gas Chromatograph (GC) and used for leaf lipids (University of Washington). | Thermo Delta V. |
| Isotopes from B. gymnorhiza mangroves in Palau during 2013 | Paired with a Temperature Conversion Elemental Analyzer (TC/EA) and used for leaf water and xylem water (Unversity of Basel) | Thermo Delta V. |
| Benthic dissolved oxygen and nutrient fluxes from sediment core incubations conducted aboard the R/V Oceanus and R/V Robert G. Sproul during nine cruises from 2018-2022 from the Oregon and Washington shelf | Finnigan DELTAplusXL gas-source isotope-ratio mass spectrometer | |
| Biogeochemical and microbial parameters collected during spatial surveys on a coral reef at Mo'orea's North Shore (French Polynesia) in September 2017, May 2019, and April 2022 | Thermo Finnigan DeltaPlus Isotope-Ratio mass spectrometer | |
| Nutrients, nitrate isotopes, and DON isotopes data from samples collected in the Gulf of Mexico on R/V Nancy Foster cruises NF1704 and NF1802 in May 2017 and May 2018 | Thermo Finnigan Delta V isotope ratio mass spectrometer | |
| Boron isotopes and trace elements experimental data of tropical corals | Boron isotopes were measured at the University of Cambridge (Cambridge, UK) utilizing an MC-ICP-MS Neptune+ equipped with 10^13 ohm amplifiers technology (Lloyd et al., 2018). | MC-ICP-MS Neptune+ |
| Bulk Carbon and Nitrogen isotopes from sperm whale dentin from the UC-Santa Cruz labs of P. Koch and M. McCarthy (Sperm Whale SI Ratios project) | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Compound-specific Carbon isotopes from sperm whale dentin from the UC-Santa Cruz labs of P. Koch and M. McCarthy (Sperm Whale SI Ratios project) | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Compound-specific Nitrogen isotopes from sperm whale dentin from the UC-Santa Cruz labs of P. Koch and M. McCarthy (Sperm Whale SI Ratios project) | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Bulk and CSIA-AA stable isotopes in sinking POM (sediment trap collected) and proteinaceous deep-sea coral skeletal material in Monterey Bay from 1998 to 2007 | CSIA-AA δ13CAA and δ15NAA values were determined using a Thermo Trace Ultra gas chromatography (GC) coupled with a Finnigan MAT DeltaPlus XL IRMS at UCSC SIL. | Finnigan MAT DeltaPlus XL IRMS |
| Bulk raw isotopic data from tissue samples from pelagic fish from R/V Kilo Moana cruise KM1123 in the north and west of the island of O'ahu in 2011 | Bulk sample nitrogen (N) and carbon (C) isotope compositions of all fishes were determined using an isotope ratio mass spectrometer (IRMS; Delta PlusXP) coupled to an elemental analyzer (Conflo IV/Costech ECS 4010). Individual amino acids were measured using an IRMS (Delta PlusXP, Delta V Plus or MAT 253) interfaced with a gas chromatograph (Trace GC). | isotope ratio mass spectrometer |
| Bulk raw isotopic data from tissue samples from non-tuna species collected in the eastern tropical Pacific Ocean onboard two NOAA research ships, David Starr Jordan and McArthur II, (cruises SWFSC1630 and SWFSC1631) in 2006 | Stable isotope values of nitrogen were determined using an on-line carbon-nitrogen analyzer coupled with an isotope ratio mass spectrometer (FinniganConFlo II/Delta-Plus). | Isotope-ratio Mass Spectrometer |
| Bulk raw isotopic data from tissue samples from three species of tunas collected in the eastern tropical Pacific Ocean onboard commercial tuna purse-seine vessels from 2003-2005 | Stable isotope values of nitrogen were determined using an on-line carbon-nitrogen analyzer coupled with an isotope ratio mass spectrometer (FinniganConFlo II/Delta-Plus). | Isotope-ratio Mass Spectrometer |
| Raw sediment C isotope values collected in Massachusetts from 2012 to 2015 | Usted to determine stable isotope ratios | Hewlett-Packard 6890 GC interfaced to a DeltaPlus IRMS |
| Bulk sediment organic matter composition of three marsh ponds in PIE-LTER (Rowley, MA) from 2014. | Extracted and analyzed concentrations | Isotope mass spectrometer |
| Bulk soil and elemental properties of marsh and infilled pond soils collected in 2014-2015 within Plum Island Ecosystems LTER | Dual-Inlet and Continuous Flow Isotope Ratio Mass Spectrometer for elemental and stable isotopic analysis. | Dual-Inlet and Continuous Flow Isotope Ratio Mass Spectrometer |
| Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| Carbon and nitrogen data from kelp determined during seasonal global change experiments examining the effects of seasonal variation in light availability and nutrients on the response of three high-latitude kelp species | Dried tissue was analyzed for nitrogen content and δ13C values by the UCSC Stable Isotope Laboratory using a CE Instruments NC2500 elemental analyzer coupled to a Thermo Scientific DELTAplus XP isotope ratio mass spectrometer via a Thermo-Scientific Conflo III. | Thermo Scientific DELTAplus XP isotope ratio mass spectrometer |
| Carbon geochemistry of Santa Elena (Costa Rica) ultramafics and bulk rock carbonate samples from expeditions 149, 173, and 209 on R/V JOIDES Resolution in the Iberia Abyssal Plain, Iberian Margin, and Mid-Atlantic Ridge from 1993-2003 | TC contents, d13CTC and d13CTOC were determined on a Vario ISOTOPE elemental analyzer (EA) coupled to an Isoprime 100 isotope ratio mass spectrometer (IRMS). The d13CTIC and d18OTIC and TIC contents were analyzed on a MultiFlowGeo headspace sampler attached to an Isoprime 100 IRMS. | Isoprime 100 |
| Elemental and isoptopic composition of sediment and biomass from the Carpinteria Salt March sampled in 2020 and 2021 | Thermo Scientific Delta V Plus Isotope Ratio Mass Spectrometer (IRMS) via Conflo IV to measure δ34S | Thermo Scientific Delta V Plus Isotope Ratio Mass Spectrometer (IRMS) via Conflo IV |
| Change in denitrification due to oyster reefs from the coast of North Carolina in 2010 | IRMS | |
| Chemical data associated with field collections from the Gulf of Maine, Nauset Marsh Estuary System, and Long Island Sound (Alexandrium isotopes project) | Used to perform isotope analysis of NH4+ and POM | Finnigan-MAT DeltaPlus Isotope Ratio Monitoring Mass Spectrometer |
| Chemical data associated with field collections from the Gulf of Maine, Nauset Marsh Estuary System, and Long Island Sound (Alexandrium isotopes project) | Used to analyze N and O stable isotopes | ThermoScientific Delta V Plus isotope-ratio mass spectrometer |
| Ammonia oxidation rates from CTD bottle samples collected during R/V Hugh R. Sharp cruises HRS1316 and HRS1317 in Chesapeake Bay from August to September of 2013 | ThermoFinnigan GasBench + PreCon trace gas concentration system interfaced to a ThermoScientific Delta V Plus isotope-ratio mass spectrometer | ThermoScientific Delta V Plus isotope-ratio mass spectrometer |
| Chlorophyll d15N in Lake Erie collected on NOAA GLERL weekly monitoring cruises from June to October 2017 | δ15N of chlorophyll was measured using the denitrifier method (Sigman et al., 2001), on a Delta V Advantage isotope ratio mass spectrometer with a custom built purge and trap system. Isotopic measurements were standardized to the N2 reference scale using standard reference materials IAEA N3 and USGS 34. | Delta V Advantage |
| Chlorophyll d15N in Lake Erie collected on NOAA GLERL weekly monitoring cruises from June to October 2017 | δ15N of biomass collected on GF/Fs was analyzed on a Thermo Scientific Flash IRMS Elemental Analyzer with EA Isolink, coupled to a Delta V Advantage IRMS through a Conflo IV universal interface. Sample δ15N values were calculated using in-house laboratory standards as well as standard reference materials USGS40 and USGS41a. | Thermo Scientific Flash IRMS Elemental Analyzer with EA Isolink |
| Record of d2H of dinosterol variability in down core lake sediments from Clear Lake, Palau | Hydrogen isotope determinations were made using a Finnigan Delta V Plus Isotope Ratio Mass Spectrometer (irMS) coupled to a Thermo Trace GC Ultra with a Varian VF-17ms FactorFour capillary column (60 m x 0.32 mm x 0.25 m) and a pyrolysis reactor. | Finnigan Delta V Plus Isotope Ratio Mass Spectrometer (irMS) |
| Closed Oyster Mesocosm 15N Tracer (Oyster Reef N2O Emission project) | 15N2 was measured on a Thermo Delta V IRMS fitted with a Gas Bench II interface following separation from O2 and Ar on a mol sieve 5A column. | Thermo Delta V IRMS |
| CN - CN Fixation Rates from R/V Knorr, R/V Melville, R/V Atlantis KN197-08, MV1110, AT21-04 in the Amazon River plume from 2010-2012 (ANACONDAS project) | IR Mass Spec | |
| Carbon and nitrogen stable isotopes of marine inorganic and organic matter around O'ahu, Hawai'i, December 2017 | Used for Particulate Organic Matter (POM) analysis in zooplankton samples. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Compound specific isotope data of amino acids for abyssal macrofauna, megafauna, sediments, sediment traps, and in situ filtered particles at Station ALOHA off Hawaii and Station M off California from 2019 to 2020 | TFA derivatives of amino acids were analyzed for stable N isotopic composition using a Thermo Scientific Delta V Plus IRMS interfaced to a trace gas chromatograph (GC) fitted with a 60 m BPx5 forte capillary column (0.32 mm internal diameter with 1.0 mm film thickness) through a GC–C III combustion furnace (980 ºC), reduction furnace (680 ºC), and liquid nitrogen cold trap. | Thermo Scientific Delta V Plus IRMS |
| Coral skeletal carbon and oxygen isotopes; measured photosynthesis to respiration ratios; isotope-based photosynthesis to respiration ratios from reef field sites in Puerto Morelos, Mexico & Kaneohe Bay, Hawaii | The CO2 from each DIC sample was sealed in Pyrex ampoules and introduced into a Finnigan Delta IV Stable Isotope Ratio Mass Spectrometer (SIRMS). | Finnigan Delta IV Stable Isotope Ratio Mass Spectrometer |
| Experimental coral physiological and δ15N isotopic measurements in October 2012 at Reef Systems Coral Farm, Ohio. | A. millepora δ15N samples measured on Costech elemental analyzer coupled to a Thermo Finnigan Delta IV stable isotope ratio mass spectrometer (EA-SIRMS). | Thermo Finnigan Delta IV stable isotope ratio mass spectrometer |
| Experimental coral physiological and δ15N isotopic measurements in October 2012 at Reef Systems Coral Farm, Ohio. | T. reniformis δ15N samples measured on Elementar Vario EL Cube/Micro Cube elemental analyzer interfaced to a PDZ Europa 20-20 stable isotope ratio mass spectrometer (EA-SIRMS). | PDZ Europa 20-20 stable isotope ratio mass spectrometer |
| Carbon and nitrogen stable isotopes of Hawaiian corals collected from August to November 2015 | All samples were combusted using a PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) at the University of California (UC) Davis Stable Isotope Facility. | PDZ Europa 20-20 isotope ratio mass spectrometer |
| Chromium concentration and isotopic composition of Cr(III) and Cr(VI) in the Eastern Tropical North Pacific from samples collected on R/V Roger Revelle and R/V Kilo Moana in April-May 2018 and Sept-Oct 2019 | IsoProbe MC-ICP-MS | |
| CSIA-AA comparison between live polyps and outer proteinaceous skeletal material in three taxons of North Pacific deep-sea corals | For AA δ13C analyses, the derivatized AAs were injected in split mode at 250°C and separated on a DB-5 column (50 m x 0.5 mm inner diameter; 0.25 mm film thickness; Agilent Technologies, Santa Clara, California, USA) in a Thermo Trace Ultra gas chromatograph (GC) at the University of California, Santa Cruz. The separated AA peaks were analyzed on a Finnegan MAT DeltaPlus XL IRMS interfaced to the GC through a GC-C III combustion furnace (960°C) and reduction furnace (630°C). For AA δ15N analyses, the derivatized AAs were injected in splitless mode at 250 °C and separated on a BPX5 column (60 m x 0.32 mm inner diameter, 1.0 mm film thickness; SGE Analytical Science, Austin, Texas, USA) in the same CG-C-IRMS interfaced through a combustion furnace (980°C), reduction furnace (650°C), and a liquid nitrogen trap. | Finnegan MAT DeltaPlus XL IRMS |
| CTD sensor and nutrient measurements from R/V Yellowfin cruises to the San Pedro Ocean Time-series (SPOT) station in 2013 and 2014 | N2O was quantified on an Isotope Ratio Mass Spectrometer at Princeton University. | Isotope Ratio Mass Spectrometer |
| N isotopic composition of Phenylalanine and Glutamic Acid from a number of organisms, demonstrating new HPLC protocol for precise isotopic measurements | Isotopic analysis was conducted on a Thermo Trace GC Ultra (Thermo Fisher Scientific, West Palm Beach, FL, USA) coupled via a Thermo GC IsoLink to a ThermoFinnigan DeltaPlus XP isotope ratio monitoring mass spectrometer (Thermo Fisher Scientific). | ThermoFinnigan DeltaPlus XP isotope ratio monitoring mass spectrometer |
| d15N of size-fractionated particulate organic nitrogen (PON) from net tows in the Sargasso Sea at BATS and Hydro Station S | The d15N of tow-collected, size-fractionated PON was determined by elemental analyzer-isotope ratio mass spectrometry (an Elementar Vario Isotope Cube online to an Elementar Isoprime visION), referencing to atmospheric N2 using USGS-40 and an in-house aminocaproic acid standard. | Elementar Isoprime visION |
| d15N of size-fractionated particulate organic nitrogen (PON) from sediment traps in the Sargasso Sea | The d15N of sinking PON was analyzed on the | Europa 20-20 or GV Isoprime |
| Natural abundance of 15N and 18O measured in samples collected over the continental shelf west of the Antarctic Peninsula on cruise LMG1801 from January to February 2018 | Gas Bench II coupled to a MAT 252 mass spectrometer | |
| Hemiaulus-Richelia physiological response to different nitrogen sources | Samples for 15N2/N2 atom % were analyzed on the GasBench-Precon-IRMS at the UC Davis Stable Isotope Facility. | GasBench-Precon-IRMS |
| Hemiaulus-Richelia physiological response to different nitrogen sources | Particulate isotope associated with isotope incubations were measured on a Thermo Fisher Delta V+ isotope ratio mass spectrometer interfaced with the Carlo Erba NC 2500 Elemental Analyzer. Both instruments are at the CASIF at the University of Maryland (UMD). | Thermo Fisher Delta V+ isotope ratio mass spectrometer |
| Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Detected 15N-labeled ammonium (NH4) in commercial 15N2 gas (15N2 Contamination project) | Data was acquired from an isotope ratio mass spectrometer using Isodat 3.0 software. | IR Mass Spec |
| Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Detected 15N-labeled nitrate (NO3) in commercial 15N2 gas (15N2 Contamination project) | The N and O isotopic composition of N2O was then measured on a Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) interfaced with a modified Gas Bench II gas chromatograph (Thermo Fisher) purge and trap system. Data was acquired from an isotope ratio mass spectrometer using Isodat 3.0 software. | Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) |
| Oxygen Isotope data from 37 R/V Albatross IV, R/V Endeavor, R/V Oceanus, and R/V Parizeau (Canadian) cruises in the Gulf of Maine and Georges Bank, the Gulf of St. Lawrence and Scotian Shelf from 1994-1999 (GB project) | The isotope ratio H218O/H216O is measured, using a VG Prism II mass-spectrometer operated by Rick Mortlock and maintained by Rick Fairbanks at LDEO. | VG Prism II Mass-Spectrometer |
| Denitrification and DNRA data from Little Lagoon, Alabama collected from 2012-2013 | Used for 15N analysis | Europa Scientific SL-2020 system |
| DIC and del13C-DIC from nine M/S Columbus Waikato cruises between New Zealand and Long Beach, CA in the Pacific Basin from 2004-2006 | del13C was measured on a Thermo Finnigan MAT 253 mass spectrometer. | Thermo Finnigan MAT 253 mass spectrometer |
| Dissolved inorganic carbon (DIC) and isotopes from vertical profiles from multi- and gravity cores from two cruises, R/V Robert Gordon Sproul SP1215 and R/V New Horizon NH1319, in the Santa Barbara and Santa Monica Basins in 2012 and 2013 | ||
| Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: 46-N2O contamination measured directly in commercial 15N2 gas (15N2 Contamination project) | The N and O isotopic composition of N2O was then measured on a Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) interfaced with a modified Gas Bench II gas chromatograph (Thermo Fisher) purge and trap system. Data was acquired from an isotope ratio mass spectrometer using Isodat 3.0 software. | Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) |
| Trace element concentrations in dissolved and particulate fractions from samples collected by GO-Flo bottles on R/V Thomas G. Thompson cruise TN280 along Line P in the NE Pacific in May 2012 (GeoMICS project) | Finnegan-MAT Element2 HR-ICP-MS | |
| Dissolved N2O concentration and stable isotope/isotopomer composition measurements from R/V Knorr cruise KN192-05 in the South Atlantic subtropical gyre and Benguela upwelling region in 2007 (CoFeMUG project) | Isotopic analyses of N2O were made using a Finnigan DELTA PLUS XP IRMS calibrated for isotopomer-specific measurements; see Frame & Casciotti (2010) for details. | Finnigan DELTA PLUS XP IRMS |
| Dissolved organic matter sulfur and carbon analysis of samples collected between 2010 and 2021 from various locations globally | SPE extracts were analyzed for their C and S concentrations and stable isotope compositions (δ13C and δ34S) via combustion elemental analyzer (EA) / isotope ratio mass spectrometry (IRMS). The system comprised a Thermo Scientific Flash EA IsoLink CN, coupled to a Delta V Plus IRMS via a ConFlo IV Universal Interface. The EA was configured with dual columns (combustion: WO3 over Cu; reduction: Cu metal) and a temperature-programmable GC column oven that allows both CO2 and SO2 to be eluted in the same run, as described by Phillips et al. (2021). Due to the high C:S molar ratios of DOM, CO2 was diluted by 88.4% following combustion via the ConFlo. Urea standards were run at the same settings to account for any possible fractionation of 13C by this dilution. | Delta V Plus IRMS |
| Analysis of dissolved 15N2 gas standards by Membrane Inlet Mass Spectrometry | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| Dissolved organic carbon (DOC) and isotopes from vertical profiles from multi- and gravity cores from two cruises, R/V Robert Gordon Sproul SP1215 and R/V New Horizon NH1319 in the Santa Barbara and Santa Monica Basins in 2012 and 2013 | ||
| Doliolid abundance, carbon and nitrogen content, chlorophyll-a, temperature, salinity, and depth from CTD casts from 25 RV Savannah cruises at the South Atlantic Bight, 2015-2017 | A ThermoFisher Delta V plus isotope ratio mass spectrometer interfaced to a Thermo Flash Elemental analyzer was used for isotope carbon and nitrogen analyses. | ThermoFisher Delta V |
| Measurements of dissolved organic nitrogen concentration and d15N from R/V Atlantis and R/V Melville cruises in the Eastern Tropical South Pacific from 2010 to 2011. | Used to collect NO3- + NO2- d15N and DON d15N data | Thermo Delta V Plus isotope ratio mass spectrometer |
| Dissolved Organic Nitrogen oxidation collected on cruise SAV 17-16 in the South Atlantic Bight aboard the R/V Savannah from 2011 to 2017 | The δ15N values of the N2O produced were measured using a Finnigan MAT-252 isotope ratio mass spectrometer coupled with a modified GasBench II interface | Finnigan MAT-252 isotope ratio mass spectrometer |
| Elemental and isotopic noble gas ratios from the Bermuda Atlantic Time-series (BATS) on cruise 10391 on R/V Atlantic Explorer (AE2208) from 30 April 2022 to 05 May 2022 | A Thermo MAT 253 Plus dual-inlet isotope-ratio mass spectrometer with custom 10-cup collector was used for Ar/Kr/Xe analysis. | Thermo MAT 253 Plus |
| Measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program North Atlantic Survey (NAS) | A Thermo MAT 253 Plus (Seltzer Lab) was used for dynamic noble gas ratios. | Thermo MAT 253 Plus |
| Measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program North Atlantic Survey (NAS) | A Thermo MAT 253 (Seltzer Lab) was used for N2, O2, Ar analysis. | Thermo MAT 253 |
| Extracted chlorophyll data, particulate carbon and nitrogen, flow cytometry and 15N2/13C rate measurements collected during EN596 from April 2017 in the North Atlantic | The carbon and nitrogen isotopic composition (13C and 15N, respectively) were analyzed by continuous-flow isotope ratio mass spectrometry using a Carlo Erba elemental analyzer (EA) connected to a Thermo DeltaPlus isotope ratio mass spectrometer (IRMS) | Thermo DeltaPlus isotope ratio mass spectrometer (IRMS) |
| Ammonia oxidation, nitrite oxidation, and nitrate reduction rates from R/V Atlantis (AT15-61) cruise in Jan-Feb 2010 and R/V Melville (MV1104) cruise in Mar-Apr 2011 in the Eastern Tropical South Pacific | Thermo Delta Plus XP isotope ratio mass spectrometer is specially designed for measurement of light environmental stable isotopes (2H, 13C, 15N, 18O, 34S) and is a sensitive and selective instrument with applications in hydrology, geology, environmental protection, paleoclimate. | Thermo Delta Plus XP isotope ratio mass spectrometer |
| Nitrate, nitrite, and nitrous oxide isotope measurements from the Eastern Tropical South Pacific ocean collected on RVIB Nathaniel B. Palmer cruise NBP1305 from June to July 2013 | All isotopic measurements were made on a ThermoFinnigan DeltaPLUS XP isotope ratio mass spectrometer. | ThermoFinnigan DeltaPLUS XP |
| Nitrous oxide (N2O) concentrations and associated physicochemical parameters from R/V Atlantis cruise AT15-61 in Jan-Feb 2010 and R/V Melville cruise MV1104 in Mar-Apr 2011 in the Eastern Tropical South Pacific (ETSP) | Thermo Fisher Delta V Plus | |
| Nitrate (NO3-) and Nitrite (NO2-) d15N and d18O from R/V Atlantis cruise AT15-61 in Jan-Feb 2010 and R/V Melville cruise MV1104 in Mar-Apr 2011 in the Eastern Tropical South Pacific (ETSP) | Used to analyze NO3- and NO2- d15N and d18O. | Thermo Delta Plus XP isotope ratio mass spectrometer |
| Kinetics of δ18O and Δ47 equilibration in the dissolved carbonate system revealed by time-series quantitative inorganic carbonate precipitation experiments and numerical modeling. | Thermo Finnigan MAT253 dual-inlet isotope ratio monitoring mass spectrometer. | Thermo Finnigan MAT253 |
| New experimental constraints on the magnitude of kinetic C and O isotope fractionation for CO2 hydration | All carbonate samples (BaCO3 and NaHCO3) were analyzed at the University of California Santa Cruz for δ13C and δ18O, using a Thermo Finnigan MAT-253 dual-inlet isotope ratio monitoring mass spectrometer (irm-MS) coupled to a Kiel IV carbonate device. | Thermo Finnigan MAT-253 dual-inlet isotope ratio monitoring mass spectrometer (irm-MS) |
| Export fluxes of Th, POC, PON and bSi calcuated using sediment traps and thorium budget from samples collected on R/V Yellowfin cruises to the San Pedro Ocean Time-series (SPOT) in 2013 and 2014 | Splits were sent to the UC Davis Stable Isotope Facility (SIF) for C and N elemental analysis via an isotope ratio mass spectrometer. | Isotope-ratio mass spectrometer |
| Results from feeding assays conducted as part of seasonal global change experiments examining the effects of seasonal variation in light availability and nutrients on the response of three high-latitude kelp species | Dried tissue was analyzed for nitrogen content and δ13C values by the UCSC Stable Isotope Laboratory using a CE Instruments NC2500 elemental analyzer coupled to a Thermo Scientific DELTAplus XP isotope ratio mass spectrometer via a Thermo-Scientific Conflo III. | Thermo Scientific DELTAplus XP isotope ratio mass spectrometer |
| Content of nitrogen and carbon in tracer filters from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) | GV IsoPrime IRMS: Isotope determinations were made at U. Massachusetts Dartmouth using a GV IsoPrime IRMS, a custom purge-trap sample preparation system, and a CTC PAL autosampler. Reproducibility was better than ± 0.5‰. | IR Mass Spec |
| C and N isotope data for individual amino acids from fossil seals from the western Ross Sea, Antarctica | The amino acid N and C isotope compositions of all samples were determined with a Thermo Trace GC coupled to a Thermo-Finnigan DeltaPlus XP isotope-ratio-monitoring mass spectrometer. | GC-IRMS |
| Location, weathering, bulk isotope, and 14C data for fossil seals from the western Ross Sea, Antarctica from from 2013-2014 | This analysis was performed at the Stable Isotope Lab (SIL) at the University of California (UC) Santa Cruz on a Carlo Erba EA 1108 elemental analyzer coupled to a Thermo-Finnigan DeltaPlus XP isotope ratio mass spectrometer. | EA-IRMS |
| A compilation of dissolved noble gas and N2/Ar ratio measurements collected from 1999-2016 in locations spanning the globe | MAT 253 isotope ratio mass spectrometer | |
| A compilation of dissolved noble gas and N2/Ar ratio measurements collected from 1999-2016 in locations spanning the globe | MAT 252 isotope ratio mass spectrometer | |
| A compilation of dissolved noble gas and N2/Ar ratio measurements collected from 1999-2016 in locations spanning the globe | MAT 251 mass spectrometer | |
| A compilation of dissolved noble gas and N2/Ar ratio measurements collected from 1999-2016 in locations spanning the globe | Delta X/L isotope ratio mass spectrometer | |
| Absorption spectra and DOC concentrations from the NOAA Ship Ronald H. Brown cruise RB-07-05, R/V Pelican cruises PE07-32, PEJun2000 in the Gulf of Mexico (GoMX - NACP-OCB project) | DOC measured by wet chemical oxidation with high-amplification isotope ratio mass spectrometry (WCO-IRMS) using a WCO-modified OI Analytical Model 1010 TOC analyzer. | Isotope-ratio Mass Spectrometer |
| Aerosol Nitrate (NO3) from samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | ThermoFisher Delta V isotope ratio mass spectrometer | |
| The ratio of 13C to 12C of dissolved inorganic carbon (DIC) measured during the GEOTRACES Arctic cruise (HLY 1502, ARC01) during Fall 2015 | The d13C of the CO2 gas was measured on a Thermo Scientific MAT253 isotope ratio mass spectrometer. | Thermo Scientific MAT253 |
| Isotope ratios of Pb passing through a 0.2um Acropak capsule filter from the US GEOTRACES Arctic Expedition (GN01, HLY1502) from August to October 2015 | Nobias Chelate PA1 preconcentration followed by anion exchange purification: This method starts with a new double batch ion-exchange chelation preconcentration followed by the Reuer et al. (2003) anion exchange purification followed by isotope ratio analysis on a GV/Micromass IsoProbe multicollector ICPMS. | GV/Micromass IsoProbe multicollector ICPMS |
| Nitrate (NO3) and oxygen & deuterium isotopic composition from ice pond samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | ThermoFisher Delta V isotope ratio mass spectrometer | |
| Nitrate N and O isotope ratios from CTD niskin depth profiles collected along section HLY1502-GN01 in the Western Arctic Ocean from August to October 2015 | The product N2O was analyzed by continuous flow isotope ratio mass spectrometry on a Thermo Delta V Advantage isotope ratio mass spectrometer interfaced with a purpose-built, gas chromatography-based device for N2O extraction, concentration, and purification. | GC-IRMS |
| Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice hole water sampling on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | ThermoFisher Delta V isotope ratio mass spectrometer | |
| Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | ThermoFisher Delta V isotope ratio mass spectrometer | |
| Depth profiles of the isotopic composition (d30Si) of silicon within dissolved silicic acid on the US GEOTRACES Arctic cruise GN01 (HLY1502) from August to October 2015 | Isotopic ratio analysis was performed using a Nu Perspective isotope ratio mass spectrometer equipped with a Nu Sil inlet system. | Nu Perspective isotope ratio mass spectrometer |
| Size-fractionated major and minor particle composition and concentration from the US GEOTRACES Arctic cruise (HLY1502) on USCGC Healy from August to October 2015 | Used to analyze the following measured parameters: δ13C and δ15N | ThermoFinnigan Delta Plus XP isotope ratio |
| Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from snow collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | ThermoFisher Delta V isotope ratio mass spectrometer | |
| Nitrate N and O isotopes from the GP12 ("PANDORA") cruise in the South-West Pacific and Solomon Sea from June to August 2012 carried out as part of the international GEOTRACES program | Isotope analyses were performed on a MAT253 Thermo IRMS | MAT253 Thermo IRMS |
| d13C of Dissolved Inorganic Carbon (DIC) measured on bottle cast samples from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | The d13C of the CO₂ gas was measured on a Thermo Scientific MAT253 isotope ratio mass spectrometer. | Thermo Scientific MAT253 |
| d13C of Dissolved Inorganic Carbon (DIC) measured on bottle cast samples from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | The d13C of the CO₂ gas was measured on a Thermo Scientific MAT253 isotope ratio mass spectrometer. | Thermo Scientific MAT253 |
| Helium isotope with helium and neon concentration data from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | The helium isotope mass spectrometer is a custom-built unit manufactured at the Woods Hole Oceanographic Institution. | magnetic sector dual-collecting isotope ratio mass spectrometer |
| Helium isotope with helium and neon concentration data from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 | The helium isotope mass spectrometer is a custom-built unit manufactured at the Woods Hole Oceanographic Institution. | magnetic sector dual-collecting isotope ratio mass spectrometer |
| Nitrate d15N and d18O from Niskin bottle samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | MAT253 Thermo IRMS equipped with a custom-sample preparation system | |
| Nitrate d15N and d18O from Niskin bottle samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | MAT253 Thermo IRMS equipped with a custom-sample preparation system | |
| Size-fractionated major, minor, & trace particle composition and concentration from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from Sept to Oct 2018 | Used in the measurement of d13C and d15N. | ThermoFinnigan Delta Plus XP isotope ratio |
| Size-fractionated major, minor, & trace particle composition and concentration from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct to Nov 2018 | Used in the measurement of d13C and d15N. | ThermoFinnigan Delta Plus XP isotope ratio |
| Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) | Samples were analyzed either on a DeltaPLUS XP or DeltaV PLUS isotope ratio mass spectrometer (IRMS). | IRMS |
| Profiles of stable isotopes of silicon in silicic acid from the US GEOTRACES EPZT cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013 | IRMS method as per Brzezinski et al., 2006. | |
| Nitrous oxide (N2O) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 | Thermo Fisher Delta V Plus Isotope Ratio Mass Spectrometer | |
| Nitrate (NO3) aerosol isotopes from the U.S. GEOTRACES EPZT cruise TN303 on R/V Thomas G. Thompson in the Eastern Tropical Pacific from October to December 2013 | Based upon nitrate concentration, 10 nmol of N were injected into vials containing denitrifying bacteria to convert nitrate to nitrous oxide for isotopic analysis on a ThermoFisher Delta V isotope ratio mass spectrometer. | ThermoFisher Delta V |
| Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013 | The Isotope-ratio Mass Spectrometer is used to measure the relative abundance of isotopes in a given sample. The instrument is equipped with faraday cup collectors for determining the ratios of m/z 44, 45, and 46 in N2O generated from samples using the azide method (McIlvin and Altabet, 2005). | Thermo Fisher DeltaPLUS XP Isotope Ratio Mass Spectrometer |
| Size-fractionated major and minor particle composition and concentration collected from RV Thompson (TN303) along the US GEOTRACES EPZT transect in the Eastern Tropical Pacific during 2013 (US GEOTRACES EPZT project) | Used to measure C and N stable isotopes | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer |
| Particulate iron (pFe) isotope concentrations from the GEOTRACES EPZT cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013 | Concentrations of Al, P, V, Mn, Fe, Co, Ni, Cu, Zn, Cd, Ba, Ce, La and Pb in the labile phase were determined by analysis of the leachate on a Thermo Scientific Element XR ICP-MS. Fe concentration and d56Fe were also measured by Thermo Neptune multi-collector ICP-MS. | ICP-MS |
| Grazing experiment 4: Carbon and Nitrogen data for low-high pCO2 acclimated Rhodomonas sp. cultures (E Hux Response to pCO2 project) | Measured carbon and nitrogen composition: Micro Cube elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer at the UC Davis Stable Isotope Facility. | PDZ Europa 20-20 isotope ratio mass spectrometer |
| Grazing experiment 5: Carbon and Nitrogen data for low-high pCO2 acclimated Rhodomonas sp. cultures (E Hux Response to pCO2 project) | PDZ Europa 20-20 isotope ratio mass spectrometer | |
| Grazing experiment 6: Carbon and Nitrogen data for low-high pCO2 acclimated Rhodomonas sp. cultures (E Hux Response to pCO2 project) | PDZ Europa 20-20 isotope ratio mass spectrometer | |
| Grazing experiment 7: Carbon and Nitrogen data for low-high pCO2 acclimated Rhodomonas sp. cultures (E Hux Response to pCO2 project) | PDZ Europa 20-20 isotope ratio mass spectrometer | |
| All measurements used in the gross oxygen production estimates; from samples collected on R/V Yellowfin cruises to the San Pedro Ocean Time-series (SPOT) station in 2013 and 2014 | O2 and Ar isotope ratios were measured on a Thermofisher MAT 253 multicollector isotope ratio mass spectrometry at Woods Hole Oceanographic Institution. | Thermofisher MAT 253 multicollector isotope ratio mass spectrometry |
| Growth rates, bulk isotope values, elemental composition data from the R/V Meteor M77 cruise in the Peruvian ocean margin from November to December 2008. | Used with PDZ Europa ANCA-GSL elemental analyzer | PDZ Europa 20-20 isotope ratio mass spectrometer |
| Growth rates, bulk isotope values, elemental composition data from the R/V Meteor M77 cruise in the Peruvian ocean margin from November to December 2008. | Used with Thermo Trace GOLD GC | MAT 253 isotope ratio mass spectrometer (IRMS) |
| Depth profiles of seawater d18O and dD from R/V Knorr KN199-04 in the subtropical N. Atlantic Ocean from Oct. 2010 (U.S. GEOTRACES NAT project, GEOTRACES: Intercal Phosphate Oxygen project) | Colman Lab: All seawater samples were processed on a GasBench II (Thermo, Bremen, Germany) with a CTC GC Pal (CTC analytics) and interfaced to a Delta V Plus isotope ratio mass spectrometer (Thermo) | IR Mass Spec |
| Soluble iron (Fe) passed through 10 kDa cross-flow filter, from R/V Knorr cruise KN199-04 in the Subtropical northern Atlantic Ocean in 2010 (U.S. GEOTRACES NAT project) | Samples were analyzed by the isotope-dilution ICP-MS methods described in Lee et al. 2011, which includes pre-concentration on nitrilotriacetate (NTA) resin and analysis on a Micromass IsoProbe MC-ICP-MS | Isotope-ratio Mass Spectrometer |
| delta 15N of nitrate from R/V Knorr cruise KN199-04 & KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) | All samples were analyzed on a DeltaPLUS XP isotope ratio mass spectrometer, with custom-built inlet described in McIlvin and Casciotti, 2011. | Isotope-ratio Mass Spectrometer |
| delta 13C measurement of dissolved inorganic carbon (DIC) from R/V Knorr cruises KN199-04 and KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) | The del13C is measured on a Thermo Delta Plus XL mass spectrometer. | Isotope-ratio Mass Spectrometer |
| Dissolved lead (Pb), less than 0.2 um from R/V Knorr cruises KN199-04 and KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) | Samples analyzed by the isotope-dilution ICP-MS method described in Lee et al. 2011, which includes pre-concentration on nitrilotriacetate (NTA) resin and analysis on a Fisons PQ2+ using a 400 uL/min nebulizer. | Isotope-ratio Mass Spectrometer |
| Porewater DIC concentrations and d13C isotopic values from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma in October 2014 | Samples for DIC analysis were acidified with phosphoric acid, and measured by GC-IRMS as described (Chanton et al. 2012). | GC-IRMS |
| Organic matter C:N ratios from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma during October 2014 | ThermoFinnigan Delt Plus XP isotope ratio mass spectrometer (EA-IRMS) | |
| delta 13C values from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma during October 2014 | ThermoFinnigan Delt Plus XP isotope ratio mass spectrometer (EA-IRMS) | |
| delta 15N values from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma during October 2014 | ThermoFinnigan Delt Plus XP isotope ratio mass spectrometer (EA-IRMS) | |
| TOC concentrations from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma during October 2014 | Sediment samples were run on a Carlo Erba 1108 elemental analyzer with a Costech zero-blank autosampler (Costech Analytical Technologies, Inc., USA) interfaced to a Thermo Finnigan Delta Plus XP IRMS (Thermo Finnigan, USA). | Thermo Finnigan Delta Plus XP IRMS |
| Porewater methane concentrations and d13C-CH4 values in Alvin pushcore samples from Guaymas Basin hydrothermal sediments collected on R/V Atlantis cruise AT37-06 in December 2016 | Finnigan MAT Delta S isotope ratio Mass Spectrometer | |
| Ammonium uptake from short-term 6-hour deckboard incubations on R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Mexico in May of 2017 and 2018 | PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). C/N and isotopic analysis at the UC Davis stable isotope facility. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Nitrate uptake from short-term 6-hour deckboard incubations on R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Mexico in May of 2017 and 2018 | PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). C/N and isotopic analysis at the UC Davis stable isotope facility. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Ammonium uptake from short-term diel deckboard incubations on R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Mexico in May of 2017 and 2018 | PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). C/N and isotopic analysis at the UC Davis stable isotope facility. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Nitrate uptake from short-term diel deckboard incubations on R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Mexico in May of 2017 and 2018 | PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). C/N and isotopic analysis at the UC Davis stable isotope facility. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Nitrate uptake from in-situ incubations conducted during R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Mexico in May of 2017 and 2018 | PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). C/N and isotopic analysis at the UC Davis stable isotope facility. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Net primary production by H13CO3- uptake from in-situ incubations conducted during R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Maine in May of 2017 and 2018 | PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). C/N and isotopic analysis at the UC Davis stable isotope facility. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Averages and standard deviation across species for all macrofauna found on each carbonate rock collected during R/V Atlantis cruise AT37-13 in the Pacific margin of Costa Rica from May to June 2017 | Stable isotopes measurements (d13C and d15N) were carried out using a Costech elemental analyzer coupled to a Micromass Iso-prime isotope ratio mass spectrometer (EA/IRMS) at Washington State University. | Micromass Iso-prime isotope ratio mass spectrometer |
| High and low molecular weight (HMW, LMW) DOC 14C collected from the North Pacific Subtropical Gyre and Central North Atlantic | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer (Thermo Fisher Scientific) | |
| Water column nitrate+nitrite d15N and d18O and total dissolved nitrogen d15N measurements from R/V Ka`imikai-O-Kanaloa cruise KOK1806 (HOT LAVA) in July 2018 | Thermo Finnigan Delta V | |
| Hurricane Harvey impacts on biogeochemistry of sediments assessed using samples collected in Mission-Aransas Estuary in south Texas from June 2017 to March 2019 | Stable carbon isotopes were measured with a Thermo Delta V Plus isotope ratio mass spectrometer (coupled from a Thermo FLASH 2000 CHN Elemental Analyzer). The δ13C values were expressed relative to Vienna Pee Dee Belemnite standard, with a precision within 0.2%. | Thermo Delta V Plus isotope ratio mass spectrometer |
| Hurricane Harvey impacts on biogeochemistry of water assessed using samples collected in Mission-Aransas Estuary in south Texas from June 2017 to March 2019 | Stable carbon isotopes were measured with a Thermo Delta V Plus isotope ratio mass spectrometer (coupled from a Thermo FLASH 2000 CHN Elemental Analyzer). The δ13C values were expressed relative to Vienna Pee Dee Belemnite standard, with precision within 0.2%. | Thermo Delta V Plus isotope ratio mass spectrometer |
| Water geochemistry from surface samples collected along the Neuse River, Neuse River Estuary, and Pamlico Sound in North Carolina between October and December 2016, following the passage of Hurricane Matthew | 13C-DOC, 13C-POC and 15N-PN. The isotope-ratio mass spectrometer (IRMS) allows the precise measurement of mixtures of naturally occurring isotopes. Reference CO2 and N2 gases are calibrated to NIST- or IAEA-traceable standards of known isotopic composition. Seawater DOC is calibrated with the Hansell Deep Sea Reference. | Thermo Scientific Delta V Isotope Ratio Mass Spectrometer |
| Hydrography, nutrients, and nitrogen uptake rates from SPIROPA cruise TN368 in July 2019 | Initial and final PN isotopic composition and concentration were analyzed on a Europa 20/20 isotope ratio mass spectrometer with an automated N and carbon preparation module. | Europa 20/20 isotope ratio mass spectrometer with automated nitrogen and carbon preparation module |
| Nutrient and nitrate isotope data from the southern Benguela upwelling system from February to August 2017 | The N and O isotope ratios of the N2O gas were analysed using a Delta V Advantage continuous flow isotope ratio mass spectrometer interfaced with an online N2O extraction and purification system. | Delta V Advantage continuous flow isotope ratio mass spectrometer |
| Chemical analyses of size-fractionated particle samples collected during the BIOS-SCOPE cruise AE1819 in the Sargasso Sea in July 2018 | Thermo Flash elemental analyzer coupled to a Conflo IV and MAT 253 Plus isotope ratio mass spectrometer (EA-IRMS, Thermo Scientific). | MAT 253 Plus isotope ratio mass spectrometer |
| Nitrogen fixation incubation data from cruise TN368 in July 2019 for SPIROPA project | Initial and final PN isotopic composition and concentration were analyzed on a Europa 20/20 isotope ratio mass spectrometer with an automated N and carbon preparation module. | Europa 20/20 isotope ratio mass spectrometer with automated nitrogen and carbon preparation module |
| Microbial cell abundance,carbon fixation rates, and nitrate concentrations during shipboard incubations of vent fluids at the diffuse-flow vent Crab Spa, East Pacific Rise on RV/Atlantis cruise AT37-12, May 2017 | Used for carbon fixation measurements. | DeltaPlus Isotope Ratio Mass Spectrometer with attached Finnigan-MAT Conflo-II interface |
| Test of integrity of dissolved 15N2 gas samples stored in Exetainer vials | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| Supplementary Table 1: Results of CHNS analyses in rock samples at different depths and sample images. | DeltaPlus isotope ratio mass spectrometer | |
| Isotopes d2H and d18O in Alaskan ground, lake, and river water from the area of Toolik Lake, Alaska from 2012-2014 (Groundwater Discharge Methane project) | Laser Water Isotope Analyzer V2 (Los Gatos Research Inc) | Laser Water Isotope Analyzer V2 |
| Description and isotopic composition of the carbonate deposits in the Santa Elena Ophiolite (Costa Rica) and expeditions 149, 173, and 209 on R/V JOIDES Resolution in the Iberia Abyssal Plain, Iberian Margin, and Mid-Atlantic Ridge from 1993-2003 | TC contents, d13CTC and d13CTOC were determined on a Vario ISOTOPE elemental analyzer (EA) coupled to an Isoprime 100 isotope ratio mass spectrometer (IRMS). The d13CTIC and d18OTIC and TIC contents were analyzed on a MultiFlowGeo headspace sampler attached to an Isoprime 100 IRMS. | Isoprime 100 |
| Isotopic composition of phospholipid-linked fatty acids (PLFAs) in the surface sediments of three marsh ponds in PIE-LTER (Rowley, MA) from 2014. | Extracted and analyzed samples | 5975C mass spectrometer |
| Isotopic composition of phospholipid-linked fatty acids (PLFAs) in the surface sediments of three marsh ponds in PIE-LTER (Rowley, MA) from 2014. | Used to determine stable carbon isotope ratios of FAMEs | DeltaPlus isotope-ratio-monitoring gas chromatography-mass spectrometer (IRM-GCMS) |
| Kelp growth data from seasonal global change experiments examining the effects of seasonal variation in light availability and nutrients on the response of three high-latitude kelp species | Dried tissue was analyzed for nitrogen content and δ13C values by the UCSC Stable Isotope Laboratory using a CE Instruments NC2500 elemental analyzer coupled to a Thermo Scientific DELTAplus XP isotope ratio mass spectrometer via a Thermo-Scientific Conflo III. | Thermo Scientific DELTAplus XP isotope ratio mass spectrometer |
| Isotopes delta-11B, delta-13C and delta-18O in deep-sea bamboo corals Keratoisis (Bamboo Coral Boron Isotopes project) | Samples were analyzed on a Thermo Delta V+ with dual inlet and Kiel IV device at the Lamont-Doherty Earth Observatory (LDEO) | IR Mass Spec - Thermo Delta V+ |
| Noble gas concentrations, N2/Ar and saturation anomalies (with associated CTD data) from the Labrador Sea in 2007, 2011, 2015, 2016 (N2:Ar Deep Tracer) | Thermo Finnigan MAT253 | |
| Noble gas concentrations, N2/Ar and saturation anomalies (with associated CTD data) from the Labrador Sea in 2007, 2011, 2015, 2016 (N2:Ar Deep Tracer) | Thermo Finnigan MAT252 | |
| Noble gas concentrations, N2/Ar and saturation anomalies (with associated CTD data) from the Labrador Sea in 2007, 2011, 2015, 2016 (N2:Ar Deep Tracer) | Thermo Finnigan Delta XL | |
| Lake Michigan water chemistry data, including dissolved and particulate phosphorus, chlorophyll a, carbon dioxide, total dissolved inorganic carbon, and dissolved organic carbon from 2017 to 2020 | Finnigan MAT delta S stable isotope ratio mass spectrometer with elemental analyzer front end and ConFlo II interface; Thermo Fisher Scientific, Waltham, MA, USA. This instrument was used to measure carbon and nitrogen stable isotope ratios. After every 12th sample, an acetanilide control was run to ensure instrument calibration. Instrument precision was 0.2 per mil for both C and N isotopes based upon acetanilide controls. | Finnigan MAT delta S stable isotope ratio mass spectrometer |
| Isotopes (d11B, 87Sr/86Sr, d18O, d13C), elemental concentrations (B, Mg, Ca), and carbon content collected from the foraminifera Ammonia parkinsoniana and sediments in Celestun Lagoon, Yucatan, Mexico in June 2009 and May 2015 | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer | |
| Isotopes (d11B, 87Sr/86Sr, d18O, d13C), elemental concentrations (B, Mg, Ca), and carbon content collected from the foraminifera Ammonia parkinsoniana and sediments in Celestun Lagoon, Yucatan, Mexico in June 2009 and May 2015 | Kiel IV Carbonate Device | |
| Isotopes (d11B, 87Sr/86Sr, d18O, d13C), elemental concentrations (B, Mg, Ca), and carbon content collected from the foraminifera Ammonia parkinsoniana and sediments in Celestun Lagoon, Yucatan, Mexico in June 2009 and May 2015 | ThermoScientific MAT-253 dual-inlet isotope ratio mass spectrometer. | |
| Measured and calculated geochemistry values and uncertainty for water samples taken from the water column of Celestun Lagoon, Yucatan, Mexico in May of 2015 | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer. | |
| Measured and calculated geochemistry values and uncertainty for water samples taken from the water column of Celestun Lagoon, Yucatan, Mexico in May of 2015 | ||
| Measured and calculated geochemistry values and uncertainty for water samples taken from the water column of Celestun Lagoon, Yucatan, Mexico in May of 2015 | ThermoScientific MAT-253 dual-inlet isotope ratio mass spectrometer | |
| Carbon isotopic compositions and fractionation factors of M. jannaschii in high and low hydrogen (H2) environments | For measuring isotopic composition of dissolved inorganic carbon. | Thermo Scientific GasBench- Delta V Isotope Radio Mass Spectrometer |
| Noble gas concentrations and saturations from Marsh Pond in Massachusetts, USA from 2014. | Extracted and analyzed noble gas concentrations | Isotope mass spectrometer |
| Iodine speciation and isotope data from iodine tracer experiments at the WHOI Environmental Systems Laboratory on Martha’s Vineyard Sound | ThermoFinnigan Neptune MC-ICP-MS at the WHOI Plasma Facility. | ThermoFinnigan Neptune MC-ICP-MS |
| Mesozooplankton wet, dry, carbon and nitrogen biomass and isotope data collected in the oceanic Gulf of Mexico on R/V Nancy Foster cruises NF1704 and NF1802 in May 2017 and May 2018 | The continuous flow system consisted of a Perkin Elmer CHN analyzer coupled to a Thermo/Finnigan Delta Plus IRMS. | Thermo/Finnigan Delta Plus IRMS |
| Methane (CH4) isotopes from vertical profiles from multi- and gravity cores from cruises R/V Robert Gordon Sproul SP1215 and R/V New Horizon NH1319 in the Santa Barbara and Santa Monica Basins in 2012 and 2013 | ||
| Amino acid compound specific isotope values for micronekton from R/V Kilo Moana KM1109, KM1123, KM1407, KM1418, and other cruises in the Central North Pacific, Station ALOHA, Tropical Pacific, 2007-2014 | Used to measure carbon and nitrogen isotopic compositions. | Thermo Scientific Delta V Plus or Thermo Scientific MAT 253 IRMS |
| Comparison of Membrane Inlet Mass Spectrometry (MIMS) to Isotope Ratio Mass Spectrometer (IRMS) | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| Modern deep-sea coral (Desmophyllum dianthus) nitrogen isotopes from samples collected between 1961 and 2009 (DeepSeaCoralNitrogen project) | isotope ratio mass spectrometry | |
| N isotope data for individual amino acids from modern west Antarctic seals | CSIA was performed at UC Santa Cruz via gas chromatography-isotope ratio mass spectrometry (GC-IRMS). Amino acid δ15N values were measured on a Thermo Trace GC coupled to a Thermo-Finnigan DeltaPlus XP isotope-ratio-monitoring mass spectrometer (oxidation furnace at 980 ºC and reduction furnace at 650 ºC). | GC-IRMS |
| C and N isotope data for Ross, Weddell, and crabeater seal tissues from west Antarctica collected during multiple field seasons from 2008-2010 | This analysis was performed at the Stable Isotope Lab (SIL) of UC Santa Cruz on a Carlo Erba EA 1108 elemental analyzer coupled to a Thermo-Finnigan DeltaPlus XP isotope ratio mass spectrometer. | Thermo-Finnigan DeltaPlus XP isotope ratio mass spectrometer |
| N isotopic composition of Phenylalanine and Glutamic Acid from a number of organisms, demonstrating new HPLC protocol for precise isotopic measurements | Isotopic analysis was conducted on a Thermo Trace GC Ultra (Thermo Fisher Scientific, West Palm Beach, FL, USA) coupled via a Thermo GC IsoLink to a ThermoFinnigan DeltaPlus XP isotope ratio monitoring mass spectrometer (Thermo Fisher Scientific). | ThermoFinnigan DeltaPlus XP isotope ratio monitoring mass spectrometer |
| CTD bottle data matched to dissolved, inorganic nutrient concentrations and to stable isotope measurements of particulate nitrogen and carbon rom R/V Melville cruise MV1110 in the Western Tropical North Atlantic in 2011 | Stable isotopes were measured using continuous-flow isotope-ratio mass spectrometry (CF-IRMS) on either a Micromass Optima or Isoprime 100. Both instruments were interfaced to a Carlo Erba elemental analyzer. | Micromass Optima or Isoprime 100 |
| Underway nutrient and particle data from R/V Melville cruise MV1110 in the Western Tropical North Atlantic in 2011 | Stable isotopes were measured using continuous-flow isotope-ratio mass spectrometry (CF-IRMS) on either a Micromass Optima or Isoprime 100. Both instruments were interfaced to a Carlo Erba elemental analyzer. | Micromass Optima or Isoprime 100 |
| Q incubation data from the R/V Melville (MV1405) cruise along the California coast during July 2014 | Analysis of the atom % 15N, PN, and PC using an elemental analyzer paired with an isotope ratio mass spectrometer. | EA-IRMS |
| Test of potential mass to charge 30 interferences from O2 | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| N and O isotope effects of nitrate reduction by 3 forms of nitrate reductase (15N2 Contamination project) | NO3- δ15N and δ18O were determined with the denitrifier method (Sigman et al. 2001; Casciotti et al. 2002), wherein denitrifying bacteria lacking terminal nitrous oxide reductase (P. chlororaphis f. sp. aureofaciens ATCC 1398) quantitatively convert sample NO3- to N2O gas, which is then extracted, purified and analyzed through a modified Thermo-Scientific Gas Bench II and Delta V Advantage gas chromatograph isotope ratio mass spectrometer. | isotope ratio mass spectrometer |
| Nitrate (d15N and d18O) and nitrite (d15N) isotopic data, and corresponding hydrographic data from R/V Knorr cruise KN182-09 in the Peruvian Oxygen Deficient Zone in 2005 (N2O Cycling project) | All isotopic measurements were conducted on a Thermo Finnigan Delta PLUS XP isotope ratio mass spectrometer. | Isotope-ratio Mass Spectrometer |
| Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: The measured quantity of 15N2 added to nitrate and ammonium solutions equilibrated with 15N2 gas | The N and O isotopic composition of N2O was then measured on a Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) interfaced with a modified Gas Bench II gas chromatograph (Thermo Fisher) purge and trap system. To measure the d15N of N2 gas in the headspace of experimental samples, 75 uL of headspace was injected into 12 mL Exetainer vials previously flushed with helium, then analyzed on a Gas Bench II GC-IRMS (Delta V Advantage Plus) operated in continuous flow mode. | Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) |
| Vertical profiles of N2 gas concentrations in excess of equilibrium values along with the isotopic composition of total N2, NO3- and NO2- from R/V New Horizon cruise NH1410 in the Eastern Tropical North Pacific from May to June 2014 | The d15N of N2 was determined in the laboratory using an IsoPrime Isotope Ratio Mass Spectrometer (IRMS) as described by Charoenpong et al. (2014) using IonVantage software. An IsoPrime IRMS running IonVantage was also used to make measurements of the isotopic composition of nitrate and nitrite. | IsoPrime Isotope Ratio Mass Spectrometer (IRMS) |
| N2 gas concentration in excess of saturation determined by N2:Ar ratiometry from samples collected in the Bering Sea, Chukchi Sea, and Western Arctic on cruise HLY1702 from August to September 2017 | IsoPrime Isotope Ratio Mass Spectrometer (IRMS) | |
| Global reconstruction of surface oceanic N2O disequilibrium and its associated flux | Others (see qc2): GV IsoPrime Continuous Flow Isotope-Ratio Mass Spectrometer (CF-IRMS) | GV IsoPrime Continuous Flow Isotope-Ratio Mass Spectrometer |
| Natural abundance N2O isotopomers measured from seawater samples collected in the Eastern Tropical North Pacific during R/V Sally Ride (SR1805) cruise from March to April 2018 | Thermo Finnigan DELTA V isotope ratio mass spectrometer | |
| Natural abundance of nitrogen and carbon on filters from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) | GV IsoPrime IRMS: Isotope determinations were made at U. Massachusetts Dartmouth using a GV IsoPrime IRMS, a custom purge-trap sample preparation system, and a CTC PAL autosampler. Reproducibility was better than ± 0.5‰. | IR Mass Spec |
| Carbon, biogenic Silica, and mass fluxes from Neutrally Buoyant Sediment Trap (NBST) deployments in the North Pacific on R/V Falkor FK170124 in Jan-Feb 2017 | ||
| All measurements used in the net oxygen production estimates from R/V Yellowfin cruises to the San Pedro Ocean Time-series (SPOT) in 2013 and 2014 | Samples were sent to the laboratory of Rachel Stanley (WHOI) where they were analyzed for O2 (m/z = 32) and Ar (m/z = 40) by peak jumping using a Finnigan MAT 253 IRMS. | Finnigan MAT 253 IRMS |
| Particulate phosphate, particulate carbon, particulate nitrogen, particulate bulk isotope composition (C and N), and dissolved oxygen from Niskin bottle samples collected on R/V Kilo Moana cruise KM1910 in June 2019 | A Vario ISOTOPE select (Elementar Isoprime) was used to quantify total C, N, and delta-13C and delta-15N. Samples are combusted/reduced at high temperature to create gases (CO2 and N2); column chromatography separates the gases; a thermal conductivity detector determines the carbon and nitrogen concentrations, followed by an isotope ratio mass spectrometer for bulk isotope composition. Measurements were calibrated with an in-house aminocaproic acid standard (ACROS) and four USGS standards (#41, #41a, #65, #25). [C] and [N] (umol/L) were corrected for the average value measured on blank filters (n=6). Analytical uncertainty (determined from standards with similar isotope values) was 0.2‰ for delta-15N and 0.1‰ for delta-13C. | Vario ISOTOPE select (Elementar Isoprime) |
| Nitrate dual isotope (d15N and d18O) measurements from R/V Knorr cruise KN192-05 in the South Atlantic subtropical gyre and Benguela upwelling region in 2007 (CoFeMUG project) | Isotopic analyses of NO3 were made with a Finnigan DELTA PLUS XP IRMS using the denitrifier method. | Finnigan DELTA PLUS XP IRMS |
| Nitrogen isotope ratios (δ15N) in amino acid standards and in four field-collected samples | Isotope determinations were made at the University of Massachusetts Dartmouth using a GV IsoPrime IRMS, a custom purge-trap sample preparation system, and a CTC PAL autosampler. Reproducibility was better than ± 0.5‰. | GV IsoPrime IRMS |
| Nitrogen isotopes of coral skeleton-bound organic matter from various sampling locations world-wide | Used "denitrifier method" with isotope ratio mass spectrometer (IRMS) | IRMS |
| Noble gas isotope data from field campaigns sampling groundwater in Umatilla, Oregon during September 2020 and in Tucson, Arizona during November 2021 | The gas sample was measured on a MAT-253 dual inlet dynamic mass spectrometer at the Scripps Institution of Oceanography. | MAT-253 dual inlet dynamic mass spectrometer |
| Noble gas global observations used in the ECCO noble gas model and simulations decomposed to isolate bubble-mediated gas exchange (Noble gas modeling project) | Used for Hamme & Emerson (2013) gas measurements | isotope ratio mass spectrometer (Finnigan MAT 251 or Delta XL at UW, MAT 253 at UVic) |
| Total organic carbon content, total nitrogen content, and carbon isotope (13C and 14C) composition of atmospheric particulates from aerosol samples collected on the R/V Dong Fang Hong-3 in the western North Pacific from October to December 2019 | The δ13C values of POC were measured using a Thermal Delta V advantage isotope ratio mass spectrometer coupled with an Elemental Analyzer-IsoLink CN. | Thermal Delta V advantage |
| Depth profiles of pore water constituents from sediment cores collected on the Louisiana Shelf of the Northern Gulf of Mexico during November 2020 on R/V Savannah cruise SAV-20-07 | δ13C-DIC measurements were conducted with a Thermo Electron SurveyorLite autosampler, a Surveyor MS HPLC pump, and a LC Isolink interface coupled to a Thermo Scientific Delta V plus stable isotope mass spectrometer. | Thermo Scientific Delta V plus stable isotope mass spectrometer |
| Sediment C isotope ratios from incubations amended with 13C-labeled substrates from samples collected on cruise OC1703A aboard R/V Oceanus and cruise AT36 aboard R/V Atlantis | Isoprime VisION IRMS | |
| Sediment C isotope ratios from incubations amended with 13C-labeled substrates from samples collected on cruise OC1703A aboard R/V Oceanus and cruise AT36 aboard R/V Atlantis | DZ Europa 20-20 isotope ratio mass spectrometer | |
| Sediment N isotope ratios from incubations amended with 15N-labeled substrates from samples collected on cruise OC1703A aboard R/V Oceanus and cruise AT36 aboard R/V Atlantis | Isoprime VisION IRMS | |
| Sediment N isotope ratios from incubations amended with 15N-labeled substrates from samples collected on cruise OC1703A aboard R/V Oceanus and cruise AT36 aboard R/V Atlantis | DZ Europa 20-20 isotope ratio mass spectrometer | |
| Open Mesocosm Oyster 15N2 and N2O | 15N2 was measured on a Thermo Delta V IRMS fitted with a Gas Bench II interface following separation from O2 and Ar on a mol sieve 5A column. | Thermo Delta V IRMS |
| Other solutes from vertical profiles from multi- and gravity cores from two cruises, R/V Robert Gordon Sproul SP1215 and R/V New Horizon NH1319, in the Santa Barbara and Santa Monica Basins in 2012 and 2013 | ||
| Water column nitrate+nitrite d15N measurements from R/V L'Atalante in the southwest Pacific Ocean between New Caledonia and Tahiti from February to March 2015 | Nitrate+nitrite d15N was measured using a Thermo Finnigan Delta V isotope ratio mass spectrometer. | Thermo Finnigan Delta V isotope ratio mass spectrometer. |
| Gross and integrated gross oxygen productivity from R/V Atlantis II cruise AII-119-4 in the North Atlantic in 1989 (U.S. JGOFS NABE project) | An isotope ratio mass spectrometer was used to measure the 18/16 ratio of the dissolved O2. | Isotope-ratio Mass Spectrometer |
| Biochemistry of 3 pacific oyster cohorts from Whiskey Creek Hatchery in Netarts Bay, OR, USA from 2009-2011 | May cohorts: Larval shell carbonate δ13C was measured by reacting the freeze-dried larvae with a viscous ~105% H3PO4 solution in a Finnigan MAT Kiel III at 70 degrees C for 5 minutes after which the isotopic composition of the evolved and purified CO2 was measured on a dual inlet mass spectrometer (MAT 252 IRMS). August cohorts: Samples were flash combusted at >1020 degrees C using a Carlo Erba NA1500 Elemental Analyzer (Verardo et al. 1990) and the resulting gas was analyzed by continuous-flow mass spectrometry using a DeltaPlus XL isotope ratio mass spectrometer. | isotope ratio mass spectrometer |
| Carbonate chemistry of 3 pacific oyster cohorts from Whiskey Creek Hatchery in Netarts Bay, OR, USA from 2009-2011 | May cohorts: Larval shell carbonate δ13C was measured by reacting the freeze-dried larvae with a viscous ~105% H3PO4 solution in a Finnigan MAT Kiel III at 70 degrees C for 5 minutes after which the isotopic composition of the evolved and purified CO2 was measured on a dual inlet mass spectrometer (MAT 252 IRMS). August cohorts: Samples were flash combusted at >1020 degrees C using a Carlo Erba NA1500 Elemental Analyzer (Verardo et al. 1990) and the resulting gas was analyzed by continuous-flow mass spectrometry using a DeltaPlus XL isotope ratio mass spectrometer. | isotope ratio mass spectrometer |
| Stable isotopes of 3 pacific oyster cohorts from Whiskey Creek Hatchery in Netarts Bay, OR, USA from 2009-2011 | May cohorts: Larval shell carbonate δ13C was measured by reacting the freeze-dried larvae with a viscous ~105% H3PO4 solution in a Finnigan MAT Kiel III at 70 degrees C for 5 minutes after which the isotopic composition of the evolved and purified CO2 was measured on a dual inlet mass spectrometer (MAT 252 IRMS). August cohorts: Samples were flash combusted at >1020 degrees C using a Carlo Erba NA1500 Elemental Analyzer (Verardo et al. 1990) and the resulting gas was analyzed by continuous-flow mass spectrometry using a DeltaPlus XL isotope ratio mass spectrometer. | isotope ratio mass spectrometer |
| Particle bulk d15N values from EXPORTS cruises SR1812 on R/V Sally Ride and RR1813 on R/V Roger Revelle in August to September 2018 | MAT 253 Plus Isotope Ratio Mass Spectrometer (IRMS) | |
| Particle d15N values of amino acids from EXPORTS cruises SR1812 on R/V Sally Ride and RR1813 on R/V Roger Revelle in August to September 2018 | MAT 253 Plus Isotope Ratio Mass Spectrometer (IRMS) | |
| Particles and Zooplankton Amino Acid Compound Specific Isotope Analyses (AA-CSIA) and zooplankton biomass at Station ALOHA and the Equatorial Pacific from R/V Kilo Moana cruises KM1407, KM1418, & KM1515 from 2014-2015 | Nitrogen isotope composition of the amino acids determined using an isotope ratio mass spectrometer (Thermo Scientific Delta V Plus or Thermo Scientific MAT 253 IRMS) interfaced with a Thermo Finnigan GC-C III. | isotope ratio mass spectrometer |
| Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Particulate Nitrogen - The delta 15N of Dunaliella tertiolecta organic matter after growth in media equilibrated with 15N2 gas | The delta 15N of particulate nitrogen (PN) was analyzed using a Costech Instruments elemental combustion system (model 4010) coupled to a Thermo Scientific Delta V Advantage IRMS. | Thermo Scientific Delta V Advantage IRMS |
| Particulate nitrogen concentrations, N isotopic composition, and nitrate isotopic composition from EN532 | Thermo MAT 253 mass spectrometer | GC-IRMS |
| Carbon, nitrogen, d13C, and d15N water column data from the "SalpPOOP" cruise on R/V Tangaroa during October and November 2018 | ||
| C and N isotope data of archaeological fish bones from Penobscot Bay (Isotopes and Fish Diets GoM project) | Between 0.4 and 0.8 mg of collagen were analyzed for stable carbon and nitrogen isotope values using a ThermoFinnigan Delta Plus Advantage stable isotope ratio mass spectrometer (IRMS) coupled to a Costech elemental analyzer via a Conflo III combustion interface in the Environmental Geochemistry Laboratory, Department of Geology, Bates College. | Stable Isotope Ratio Mass Spectrometer |
| Geochemical data of ground ice and pore water in frozen sediments from the Barrow Permafrost Tunnel in Utqiaġvik, Alaska in 2017 and 2018 | Water stable isotopes were measured using a continuous-flow isotope ratio mass spectrometry. | continuous-flow isotope ratio mass spectrometry |
| Geochemical data of permafrost brines from the Barrow Permafrost Tunnel in Utqiaġvik, Alaska | Water stable isotopes were measured using a continuous-flow isotope ratio mass spectrometry. | continuous-flow isotope ratio mass spectrometry |
| Planktic foraminifer shell d15N from core-top sediments from the Sargasso Sea | The isotopic composition of N2O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N2O extraction and purification system. | Thermo MAT 253 |
| Planktic foraminifer shell d15N from net tows in the Sargasso Sea at BATS and Hydro Station S | The isotopic composition of N2O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N2O extraction and purification system. | Thermo MAT 253 |
| Planktic foraminifer shell d15N from Oceanic Flux Program (OFP) sediment traps in the Sargasso Sea | The isotopic composition of N2O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N2O extraction and purification system. | Thermo MAT 253 |
| Planktic foraminifer tissue d15N from net tows in the Sargasso Sea at BATS and Hydro Station S | The isotopic composition of N2O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N2O extraction and purification system. | Thermo MAT 253 |
| Animal condition data from Pleuromamma xiphias (Atlantic Ocean, AMT24) (Plankton Population Genetics project) | Coupled to the Elemental Analyzer through a Conflo IV interface to measure isotope values of individual copepods. | ThermoFinnigan Delta Plus XP Isotope Ratio Mass Spectrometer (IRMS) |
| Plocamium carbon and nitrogen content and stable isotope values, 2014-2015 (Seaweed OA Resilience project) | Instrument located at the University of California, Davis Stable Isotope Facility (UCD-SIF) and used to measure isotope carbon and nitrogen isotopes. | |
| Stable isotope ratio and concentration of carbon in seawater during Plocamium culture experiments, 2014-2015 (Seaweed OA Resilience project) | Used to measure isotope concentrations of 13C in the seawater samples. | GasBench |
| POC and isotopes from vertical profiles from multi- and gravity cores from two cruises from R/V Robert Gordon Sproul SP1215 and R/V New Horizon NH1319 in the Santa Barbara and Santa Monica Basins in 2012 and 2013 | ||
| Concentrations and stable isotope abundances of particulate organic carbon (POC) and particulate organic nitrogen (PON) from Niskin bottle samples taken on R/V Melville cruise MV1008 in the Costa Rica Dome in 2010 (CRD FLUZiE project) | Analyses were conducted at the Analytical Facility, Marine Science Institute, UCSB on a Finnigan Delta Plus Advantage continuous flow system with Costech ECS 4010 elemental combustion. The Finnigan DELTAplusAdvantage is a stable isotope ratio MS for dual-inlet and continuous-flow applications. | Finnigan Delta Plus Advantage |
| Biogeochemical and sediment characteristics of the Cinder Cones Methane seep site in the Ross Sea from November 2016 | The δ13C and δ2H of methane were analyzed at the University of California, Davis on a Thermo Scientific GasBench-Precon interfaced to a Thermo Delta V Plus isotope ratio mass spectrometer. | Thermo Delta V Plus isotope ratio mass spectrometer |
| Porewater geochemistry data for sediment samples included in global seep survey from R/V Atlantis cruise AT15-40 and Alvin dives in the Guaymas Basin in 2008 (Guaymas Basin interactions project) | Stable isotopic compositions of methane was measured via gas chromatography/ combustion/isotope ratio mass spectrometry (GC/C/IRMS) on a Finnigan MAT 252 Isotope Ratio Mass Spectrometer. Stable isotopic values and concentrations of DIC were analyzed via coupled GC (Hewlett Packard 5890) and Isotope Ratio Mass Spectrometer (Finnigan MAT 252). | Finnigan MAT 252 Isotope Ratio Mass Spectrometer |
| Porewater measurements of nitrate concentration and N and O isotopic ratios (d15N and d18O) from bore holes at North Pond; collected during IODP expedition 336 on R/V JOIDES Resolution in the Mid-Atlantic Ridge in 2011 | Samples were run on either a Delta V Advantage (Thermo, Inc.) at the University of Basel or an IsoPrime100 (Elementar, Inc.) | Delta V Advantage or IsoPrime100 |
| Porewater measurements of nitrate and nitrite concentration and N and O isotopic ratios (d15N and d18O) collected from sites 3 and 10 on the North Atlantic Long Core Cruise R/V Knorr KN223 from October to December 2014 | Isoprime 100 isotope ratio mass spectrometer coupled to a modified TraceGas prep system | Isoprime 100 isotope ratio mass spectrometer |
| Stable carbon isotope data for thirteen individual amino acids from twelve species of eukaryotic microalgae and four species of eukaryotic microalgae | Thermo Trace 1310 gas chromatograph (GC) and analyzed on a Finnegan MAT Delta V Plus Isotope Ratio Mass Spectrometer (IRMS) interfaced to the GC through a GC-IsoLink II and reduction furnace (1000°C) used to separate and analyze the carbon isotope values of 13 individual amino acids from each sample and standard. | Finnegan MAT Delta V Plus Isotope Ratio Mass Spectrometer (IRMS) |
| Primary production from the San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016 | IsoPrime continuous flow isotope ratio mass spectrometer | |
| Limits of detection and qPCR efficiencies from cruise SAV 17-16 in the South Atlantic Bight aboard the R/V Savannah from 2011 to 2017 | The δ15N values of the N2O produced were measured using a Finnigan MAT-252 isotope ratio mass spectrometer coupled with a modified GasBench II interface | Finnigan MAT-252 isotope ratio mass spectrometer |
| Carbon isotopes (13C and 14C) and concentrations of dissolved methane (CH4) in surface waters sampled in June 2019 at the Coal Oil Point seep field of the Santa Barbara Basin | 14C and 13C were measured by Accelerator Mass Spectrometer (AMS) and Isotope Ratio Mass Spectrometer (IRMS), respectively, at the Keck-Carbon Cycle AMS facility at UC Irvine. | Isotope Ratio Mass Spectrometer |
| Ramped pyrolysis oxidation (RPO) carbon isotope data from DOC in water samples collected during R/V Western Flyer Benthic-Pelagic Coupling expedition to Station M in the eastern Pacific Ocean in April 2018 | All bulk and RPO-fraction isotope measurements were performed at NOSAMS. Stable carbon isotope compositions were measured on the resultant CO2 gas using a dual-inlet isotope ratio mass spectrometer (IRMS). | Dual inlet IRMS |
| Reference carbon and nitrogen concentrations, and isotope ratios from alfalfa, nylon-6, bovine liver, and enriched alanine | Used for chemical and isotope analyses. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Results from a study of physiological responses of Ulva lactuca to ocean acidification and nutrient enrichment | Samples were analyzed for δ15N and δ13C using the elemental analysis – isotope ratio mass spectrometry technique, which also provides results for tissue C and N content | elemental analysis – isotope ratio mass spectrometry |
| Carbon and nitrogen content of Rhodomonas cells grown with varying CO2 levels for copepod experiments, 2015 (OA-Copepod_PreyQual project) | PDZ Europa 20-20 isotope ratio mass spectrometer | |
| Compound-specific carbon isotopes from sperm whale skin tissue from the UC-Santa Cruz labs of P. Koch and M. McCarthy (Sperm Whale SI Ratios project) | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Compound-specific nitrogen isotopes from sperm whale skin tissue from the UC-Santa Cruz labs of P. Koch and M. McCarthy (Sperm Whale SI Ratios project) | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Sperm whale skin tissue samples analyzed for C and N at UC-Santa Cruz: date and location of collection from the California Current System | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Sperm whale skin bulk C and N isotopes from the California Current System, 1972 to 2005 | Thermo Finnigan DeltaPlus XP isotope ratio mass spectrometer (Thermo Scientific, Bremen, Germany) | |
| Hydrocarbon concentrations, DIC isotopes, nutrients, and cyanobacteria counts from samples collected on R/V Neil Armstrong cruise AR16 in the western north Atlantic during May 2017 | gas chromatograph combustion isotope ratio mass spectrometer (GC/C-IRMS) | |
| Hydrocarbon concentrations, DIC isotopes, nutrients, and cyanobacteria counts from samples collected on R/V Neil Armstrong cruise AR16 in the western north Atlantic during May 2017 | Deltaplus XP isotope ratio mass spectrometer (Thermo Finnigan) | |
| Bulk N2 fixation measurements from UCYN-A symbiosis in the Southern California Current System from May 2017 (SP1714) and October (SP1724) SCCS cruises. | Samples for bulk PON/POC and N2 fixation and CO2 fixation rates were measured on an Elemental Combustion System (Costech Analytical Technologies) interfaced to a Thermo Finnigan Delta V Advantage isotope ratio mass spectrometer (Thermo Fisher Scientific) at the SOEST Biogeochemical Stable Isotope Facility at the University of Hawai’i, Manoa. | hermo Finnigan Delta V Advantage isotope ratio mass spectrometer (Thermo Fisher Scientific) |
| Carbon, nitrogen and their isotope composition of eelgrass from Virginia Coastal Lagoons and turtlegrass from St George Sound FL | Used for chemical and isotope analyses. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| Nutrient content and stable isotope ratios from seagrasses in Texas over one year following Hurricane Harvey | Thermo Fisher Scientific Delta V Plus isotope-ratio-mass-spectrometer | |
| Summary of carbon and nitrogen concentrations and isotope ratios from samples of eelgrass from Virginia Coastal Lagoons and turtlegrass from St George Sound FL | Used for chemical and isotope analyses. | PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK) |
| N2O, 15N2, 15N tissue tracer in oyster aquariums (Oyster Reef N2O Emission project) | 15N2 was measured on a Thermo Delta V IRMS fitted with a Gas Bench II interface following separation from O2 and Ar on a mol sieve 5A column. | Thermo Delta V IRMS |
| Isotope ratios of carbon and nitrogen from harbor seals and prey species analyzed at the Stable Isotope Core Laboratory in Pullman, WA in 2009 (Seal_response_to_prey project) | Samples were analyzed with a Thermo Finnigan Delta PlusXP continuous flow isotope ratio mass spectrometer. | Isotope-ratio Mass Spectrometer |
| Biogeochemical data from sediment cores collected from a shallow, sandy subterranean estuary (STE) in Virginia USA from 2018 to 2019 | Gas bench isotope ratio mass spectrometer (IRMS) Delta V Plus, Thermo Fisher Scientific, Waltham, MA. | Delta V Plus, Thermo Fisher Scientific |
| Sediment delta-13C methane and concentrations from pushcore samples collected at Guaymas Basin hydrothermal vents via Alvin dives on RV/Atlantis cruise AT42-05, Nov. 2018 | Used to measure carbon isotopes. | Thermo Finnigan Delta plusXL Isotope Ratio Mass Spectrometer |
| Sediment fluxes of dissolved gasses and nutrients from the coast of North Carolina in 2010. | IRMS | |
| Sediment NO3 reduction rates, associated genes, and environmental data from bimonthly samples collected along the York River Estuary from June 2018 to April 2019 | ²⁹N₂ and ³⁰N₂ were measured in the gaseous form by an isotope ratio mass spectrometer (Model Delta V, ThermoScientific). | isotope ratio mass spectrometer (Model Delta V, ThermoScientific) |
| Sediment PLFA isotope values from Massachusetts collected from 2012-2015 | Usted to determine stable isotope ratios | Hewlett-Packard 6890 GC interfaced to a DeltaPlus IRMS |
| Sediment core porewater and particulate measurements from three sites on the Louisiana Shelf sampled during R/V Pelican cruises from December 2021 through August 2022 | Samples measured at University of California Davis were run on an elemental analyzer interfaced to a continuous flow isotope ratio mass spectrometer. See Stable Isotope Facility instrument descriptions here: https://stableisotopefacility.ucdavis.edu | CF-IRMS at UC Davis (continuous flow isotope ratio mass spectrometer) |
| Sediment trap carbon, nitrogen, and isotope flux from the "SalpPOOP" cruise on R/V Tangaroa during October and November 2018 | isotope ratio mass spectrometer | |
| Sediment trap-derived flux of salp fecal pellets (carbon mass flux) from the "SalpPOOP" cruise on R/V Tangaroa during October and November 2018 | isotope ratio mass spectrometer | |
| Characterization of dissolved organic carbon (DOC) in estuarine waters near Sapelo Island, GA, using ultrahigh-resolution mass spectrometry and stable carbon isotope analyses. | Bulk delta-13C ratios of extracted DOC (SPE-DOC) were measured | Finnigan MAT 251 isotope ratio mass spectrometer |
| Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) data from seasonal collections, Doboy Sound, Sapelo Island, GA, 2012 and 2013 | Bulk delta-13C ratios of extracted DOC (SPE-DOC) were measured | Finnigan MAT 251 isotope ratio mass spectrometer |
| Bulk stable isotopes from siphonophores collected during four research cruises on the R/V Wester Flyer in the California Current Ecosystem between 2019 and 2021 | For bulk stable isotope analysis, siphonophore samples were analyzed using a Costech (Valencia, CA, USA) elemental combustion system coupled to a Thermo-Finnigan Delta XP isotope ratio mass spectrometer with N2 standard for nitrogen and Vienna Pee Dee Belemnite for carbon. | Thermo-Finnigan Delta XP isotope ratio mass spectrometer |
| Compound-specific isotope analysis of amino acids (CSIA-AA) from a subset of siphophore samples collected during four research cruises on the R/V Wester Flyer in the California Current Ecosystem between 2019 and 2021 | CSIA-AA was also conducted at the University of Hawaii’s Isotope Geochemistry Facility using acid hydrolysis followed by derivatization (see Popp et al. [2007] and Hannides et al. [2013] for details). Derivatives were analyzed using a Thermo-Finnigan Delta V Plus isotope ratio mass spectrometer (IRMS), interfaced with a Thermo Trace GC gas chromatograph via GC-C III combustion furnace (980°C), reduction furnace (680°C), and a liquid nitrogen cold trap. | Thermo-Finnigan Delta V Plus isotope ratio mass spectrometer (IRMS) |
| Size fractionated zooplankton C:N, d13C, and d15N from the EXPORTS cruise on R/V Roger Revelle (RR1813) during August and September 2018 | Thermo-Finnigan Delta Plus XP isotope ratio mass spectrometer with Conflo IV interface. | Thermo-Finnigan Delta Plus XP |
| Size fractionated zooplankton, C:N, d13C, and d15N from RRS James Cook cruise JC214 | Thermo-Finnigan Delta Plus XP isotope ratio mass spectrometer with Conflo IV interface | |
| Soil physicochemical properties of coastal wetland soil cores collected in June 2018 from Barataria Bay, Louisiana | Thermo Electron Delta V Advantage isotope ratio mass spectrometer | |
| Nitrate and Oxygen isotope measurements from CLIVAR line P16S in 2005 from R/V Roger Revelle ZHNG02RR in the A meridional transect from 16 to 71 degrees South along 150 degrees West from January to February 2005 (CAREER project) | These measurements are referenced to atmospheric N2 or Vienna Standard Mean Ocean Water, respectively, with analytical precision of 60.2% for nitrate 15N and 60.3% for nitrate 18O for in-house seawater-based reference material. | Isotope Ratio Mass Spectrometer |
| Southern Ocean deep-sea fossil coral (Desmophyllum dianthus) nitrogen isotope records generated using Monte Carlo and Kalman Filters generated using Monte Carlo and Kalman Filters (DeepSeaCoralNitrogen project) | isotope ratio mass spectrometry | |
| Southern Ocean deep-sea fossil coral (Desmophyllum dianthus) nitrogen isotopes from R/V Nathaniel B. Palmer and R/V Thompson cruises between 2008 and 2011 (DeepSeaCoralNitrogen project) | isotope ratio mass spectrometry | |
| Planktic foraminifer tissue and shell d15N from net tows on R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Thermo MAT 253 mass spectrometer | |
| Planktic foraminifer tissue and shell d15N from net tows on R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Thermo Scientific Delta V Plus | |
| Bulk suspended PON d15N from several cruises conducted in the Southern Ocean south of Africa from 2012-2019 | Thermo Scientific Delta V Plus mass spectrometer | |
| Nitrate+nitrite and nitrate-only d15N from R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Thermo MAT 253 | |
| Size-fractionated zooplankton d15N from net tows on R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Thermo Scientific Delta V Plus | |
| Size-fractionated zooplankton d15N from net tows on R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Thermo Scientific Delta V Plus | |
| Stable carbon isotopic signatures of solid-phase extracted DOC from seawater collected on three GO-SHIP Repeat Hydrography Cruises in 2015-2018 along transects P16N, P18, and I07N. | Stable carbon isotopic measurements (δ13C) were made using a Gas Bench II and Thermo Electron Delta Plus mass spectrometer | Thermo Electron Delta Plus mass spectrometer |
| Spring 2011 -Sediment Gas Concentrations and Stable Isotope Values | Stable isotope data were obtained from an gas chromatograph coupled to as stable isotope ratio monitoring mass spectrometer | Stable Isotope Ratio Monitoring Mass Spectrometer |
| Spring 2012 - d13C and d2H Stable Isotope Composition | Samples were run on an IRMS | IRMS |
| 2012 Arctic Sediment/Permafrost Master | Gas samples were run on a flame ionizing detector and/or IRMS | IRMS |
| Carbon and nitrogen isotope data from zooplankton and fish larvae collected on the SR2114 expedition in the Eastern Tropical North Pacific aboard the R/V Sally Ride from December 2021 to January 2022 | Carbon and nitrogen isotope ratios were measured at the Boston University Stable Isotope Laboratory using a GV Instruments IsoPrime isotope ratio mass spectrometer coupled with an elemental analyzer. | GV Instruments IsoPrime isotope ratio mass spectrometer |
| Time series observations: hydrography, nutrients, and microbial, phytoplankton and zooplankton communities from the Skidaway River Estuary on the southeastern Atlantic coast of Georgia from 1986-2011 (SRiMP project) | Continuing from mid 2011 to present, water samples for DIC and delta 13/12 C isotope ratios of 0.02 nylon filtered water samples is analyzed inhouse using a Mass Spectrometer (Thermo Scientific) in the lab of Dr. Jay Brandes (Skidaway Island Scientific Stable Isotope Laboratory, SISSIL) | Thermo Scientific Mass Spectrometer |
| d13C and d18O isotopic data for carbonate nodules and sedimentary carbonates in Guaymas Basin and Sonora Margin sediments collected from R/V El Puma, leaving Guaymas on October 14, 2014 and returning to Mazatlan on October 27, 2014 | Isotope analyses was performed on ~500 µg of sediment using a Kiel devise coupled with a Thermo MAT 253 gas ratio mass spectrometer at the University of California, Santa Cruz. | Thermo MAT 253 |
| Stable carbon isotopic composition of organic matter from seafloor basalts incubated with labeled bicarbonate from R/V Atlantis AT15-51, R/V Kilo Moana KM0923, and Maria S. Merian MSM20-5 cruises | Dried samples of basalt (20–70 mg) were placed into tin foil capsules for isotopic analysis of 13C/12C ratios. Samples were analyzed using a Costech elemental analyzer in line with a Micromass Isoprime continuous flow stable isotope mass spectrometer. | Micromass Isoprime continuous flow stable isotope mass spectrometer |
| Isotopic analysis of ¹³C and ¹⁵N for sponges, coral, and zooxanthellae (family Symbiodiniaceae) used in a 'pulse-chase' experiment to examine the uptake of sponge-derived nutrients by the coral holobiont | Europa 20-20 continuous-flow isotope ratio mass spectrometer | |
| Carbon and Nitrogen stable isotope measurements for experimental animals used in laboratory-based experiments collected from the Gulf of Mexico Estuary near Port Aransas, Texas from 2020 to 2022 | ThermoFisher Scientific Delta V isotope ratio mass spectrometer (IRMS) coupled to a ThermoFisher Scientific EA-Isolink CNSOH element analyzer. | ThermoFisher Scientific Delta V isotope ratio mass spectrometer (IRMS) |
| Carbon and Nitrogen stable isotope measurements for various marine samples collected from the Gulf of Mexico as well as eggs, animals, and food sources collected in the laboratory and commercial sources from 2020 to 2022. | ThermoFisher Scientific Delta V isotope ratio mass spectrometer (IRMS) coupled to a ThermoFisher Scientific EA-Isolink CNSOH element analyzer. | ThermoFisher Scientific Delta V isotope ratio mass spectrometer (IRMS) |
| The acetate and inorganic carbon uptake rates as determined via stable isotopic tracers from Maria S. Merian cruise MSM20-5 in 2012; data generated using the formation fluids recovered from CORKs installed at North Pond | Filters were weighed into tin capsules and analyzed for 13C/ 12C ratios with an automated Isotope Cube elemental analyzer (Elementar, Germany) interfaced to a Delta Advantage isotope ratio mass spectrometer (Thermo, Germany). | Delta Advantage isotope ratio mass spectrometer |
| C and N stable isotopes and elemental ratios of high and low molecular weight (HMW, LMW) DOM collected from the North Pacific Subtropical Gyre and Central North Atlantic determined by elemental analyzer isotope ratio mass spectrometry (EA-IRMS) | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer (Thermo Fisher Scientific) | |
| Dissolved black carbon (DBC) concentrations and related data from water samples collected between 2011 and 2019 in the Pacific and Atlantic Oceans and from rivers in North America, South America, Africa, and Russia | Thermo Scientific Flash EA Isolink CNSOH interfaced with a Thermo Scientific Delta V Plus IRMS – To measure stable carbon isotopic values of SPE-DOC for all samples. | Thermo Scientific Delta V Plus IRMS |
| Sediment Nitrification Incubation data of a subterrarnian estuary core take in July 2020 in Gloucester Point, Virginia | Gas bench isotope ratio mass spectrometer (IRMS) Delta V Plus, Thermo Fisher Scientific, Waltham, MA. | Gas bench isotope ratio mass spectrometer |
| Sulfur geochemistry of the Santa Elena (Costa Rica) ultramafics; R/V JOIDES Resolution JRES-149, JRES-173, JRES-209 cruises in the Iberia Abyssal Plain, Iberian Margin, and Mid-Atlantic Ridge from 1993-2003 | TC contents, d13CTC and d13CTOC were determined on a Vario ISOTOPE elemental analyzer (EA) coupled to an Isoprime 100 isotope ratio mass spectrometer (IRMS). The d13CTIC and d18OTIC and TIC contents were analyzed on a MultiFlowGeo headspace sampler attached to an Isoprime 100 IRMS. | Isoprime 100 |
| Radiocarbon data from R/V Blue Heron cruise BH09-12 on Lake Superior in August 2009 (Lake Superior Radiocarbon project) | Costech ECS 4010 elemental analyzer (EA) Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS) Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations. | Isotope-ratio Mass Spectrometer |
| Radiocarbon data from R/V Blue Heron cruise BH10-14 on Lake Superior in August 2010 (Lake Superior Radiocarbon project) | Costech ECS 4010 elemental analyzer (EA) Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS) Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations. | Isotope-ratio Mass Spectrometer |
| Radiocarbon data from R/V Blue Heron cruise BH09-05 on Lake Superior, June 2009 (Lake Superior Radiocarbon project) | Costech ECS 4010 elemental analyzer (EA) Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS) Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations. | Isotope-ratio Mass Spectrometer |
| Radiocarbon data from R/V Blue Heron cruise BH10-03 on Lake Superior in May 2010 (Lake Superior Radiocarbon project) | Costech ECS 4010 elemental analyzer (EA) Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS) Particulate organic samples (on GF/F filters) were fumigated with HCl, dried, then loaded into tin capsules and analyzed for particulate organic carbon (POC) and particulate organic nitrogen (PON) concentrations using a Costech ECS 4010 elemental analyzer (EA) coupled to Finnigan Delta Plus XP isotope ratio mass spectrometer (IRMS). The EA was calibrated with acetanilide (Costech Analytical Technologies Inc., Valencia, CA, USA) and caffeine (SigmalUltra; Wheaton Science Products, NJ, USA) reference standard materials; C and N were quantified using the IRMS. Typical instrumental precisions for POC and PON measurements were respectively, 0.2% and 0.4% of the measured concentrations. | Isotope-ratio Mass Spectrometer |
| Surface Sedimentary Black Carbon Concentrations, Flux, and Carbon Isotopes Values from the R.V. Endeavor EN651 in the Equatorial Atlantic Ocean from March 2020 | Isotope Ratio Mass Spectrometer (Thermo Delta V Advantage) | Isotope Ratio Mass Spectrometer |
| Suspended particle total mercury and monomethylmercury in the California Current Ecosystem (CCE) determined from samples collected on R/V Roger Revelle cruise RR2105 (P2107) in July to August 2021 | Thermo Finningan Delta Plus XP IRMS | |
| Suspended particles from in situ pumps on R/V Kilo Moana cruise KM1910 in June 2019 | EA-IRMS at MBL Stable Isotope Lab: Europa 20-20 continuous-flow isotope ratio mass spectrometer interfaced with a Europa ANCA-SL elemental analyzer. Measurements were calibrated using international and in-house reference materials analyzed in the same analytical run. The analytical precision based on replicate analyses of isotopically homogeneous international standards is +/- 0.1 ‰ (1 sigma) for both δ 15N and δ 13C measurements, and about 1% relative on the %N and %C measurements. | Europa 20-20 |
| Suspended particles from ship’s surface intake samples collected on R/V Kilo Moana cruise KM1910 in June 2019 | Bulk isotope composition. | |
| Suspended particulate organic matter composition of three marsh ponds in PIE-LTER (Rowley, MA) from 2014. | Extracted and analyzed isotopes | Isotope mass spectrometer |
| Record of abundance and δ2H of dinosterol in down core lake sediments from T Lake, Palau collected in September 2013 | Delta V Plus IRMS (Thermo). Isotope ratio mass spectrometer with continuous flow inlet, interfaced to open split in GC-TC interface. | Delta V Plus IRMS (Thermo) |
| The influence of reactive oxygen species on "‘respiration" isotope effect | Thermo Scientific MAT 253 Plus isotope ratio mass spectrometer (IRMS) | |
| Ammonium in tidepools with and without mussels from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) | GV IsoPrime IRMS: Isotope determinations were made at U. Massachusetts Dartmouth using a GV IsoPrime IRMS, a custom purge-trap sample preparation system, and a CTC PAL autosampler. Reproducibility was better than ± 0.5‰. | IR Mass Spec |
| Ammonium levels in incubated bottles in tidepools from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) | GV IsoPrime IRMS: Isotope determinations were made at U. Massachusetts Dartmouth using a GV IsoPrime IRMS, a custom purge-trap sample preparation system, and a CTC PAL autosampler. Reproducibility was better than ± 0.5‰. | IR Mass Spec |
| Water column nitrate plus nitrite d15N measurements from seawater collected in November 2019 and November 2020 in the Western Tropical South Pacific | NO3-+NO2- d15N was measured using a Thermo Finnigan Delta V isotope ratio mass spectrometer | Thermo Finnigan Delta V isotope ratio mass spectrometer |
| Total dissolved chromium (Cr) concentration and isotopic composition in the Eastern Tropical North Pacific from samples collected on R/V Roger Revelle and R/V Kilo Moana in April-May 2018 and Sept-Oct 2019 | IsoProbe MC-ICP-MS | |
| Total DOC 14C from samples collected from the North Pacific Subtropical Gyre and Central North Atlantic | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer (Thermo Fisher Scientific) | |
| Nutrient transfer experiments with host coral and symbionts under varying environmental conditions conducted March 2014 and March 2015 | Elemental 13C and 15N analyses were performed on a Carlo Erba CHN Elemental Analyzer (Model NA1500) coupled to Thermo Finnigan Delta V Isotope Ratio Mass Spectrometer via a Thermo Finnigan Conflo III Interface at the University of Georgia, Center for Applied Isotope Studies. | Thermo Finnigan Delta V Isotope Ratio Mass Spectrometer |
| Trial A test of the dissolution method for estimates of the 15N2 atom% of incubations | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| Trial B test of the dissolution method for estimates of the 15N2 atom% of incubations | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) | Isotope Ratio Mass Spectrometer |
| Experimental results from a study of CO2 and N2 fixation and trichome length of Trichodesmium erythraeum under varying pCO2 and light conditions (PhytoTM_in_HighCO2 project) | A Europa 20/20 isotope ratio mass spectrometer equipped with an automated nitrogen and carbon analyzer (ANCA) was used in determination of N2 fixation rates. The Europa was originally manufactured by Europa Scientific Inc., Cincinnati OH, USA and was refurbished by PDZ Europa Limited, Elworth, Sandbach, Cheshire, UK. | Isotope-ratio Mass Spectrometer |
| Triple oxygen isotopes of respiration and photo-oxidation of DOC | Thermo Scientific MAT 253 Plus isotope ratio mass spectrometer | |
| Sets of sediment cores taken for isotope pairing and other nitrogen cycle parameters seasonally since November 2013 from two oyster farm and control sites in Rhode Island and New York | Sediment bound 15N-NH4+ enrichment is measured using the azide hypobromide method (Zhang et al. 2007) and are run on the isotope ratio mass spectrometer (IRMS). | isotope ratio mass spectrometer |
| Stable isotope ratios and mass of carbon and nitrogen in Ulva cells under ocean acidification conditions (Seaweed OA Resilience project) | Instrument located at the University of California, Davis Stable Isotope Facility (UCD-SIF) and used to measure isotope carbon and nitrogen isotopes. | |
| Stable isotope ratio and concentration of carbon in seawater from Ulva OA experiments (Seaweed OA Resilience project) | Used to measure isotope concentrations of 13C in the seawater samples. | GasBench |
| Dissolved and sinking particulate organic nitrogen data from a large volume mesocosm experiment in the Noumea Lagoon, New Caledonia, measured from January to February 2013 | DON d15N was measured on a Thermo Delta V isotope ratio mass spectrometer. | Thermo Delta V isotope ratio mass spectrometer |
| Average nitrate d15N values from the upper 1000 meters of the water column at four stations sampled in the Eastern Tropical North Pacific on R/V Sally Ride cruise SR2113 in December 2021 | The isotopic composition of the resulting nitrous oxide was analyzed on a custom gas bench system coupled to a Delta V Plus isotope ratio mass spectrometer. | Delta V Plus isotope ratio mass spectrometer |
| C and N isotope data for zoo- and phytoplankton from west Antarctica | For δ15N and δ13C analyses, ~ 1 mg of samples were weighed into tin cups (Costech, 3×5 mm) for elemental analysis-isotope ratio mass spectrometry (EA-IRMS). The PAL-LTER krill were analyzed at VIMS on a Costech ECS 4010 CHNS-O Elemental Analyzer (EA) (Costech Analytical Technologies, Inc.) coupled to a Delta V Advantage Isotope Ratio Mass Spectrometer (IRMS) with a Conflo IV Interface (Thermo Electron North America, LLC). All other phytoplankton and zooplankton samples were analyzed at the Stable Isotope Lab at UC Santa Cruz using a Carlo Erba EA 1108 EA coupled to a Thermo-Finnigan DeltaPlus XP IRMS referenced to AIR and V-PDB standards for N and C, respectively. | EA-IRMS |
| Size fractionated zooplankton d13C and d15N of individual amino acids from EXPORTS cruise RR1813 in August 2018 | Thermo Scientific Delta V Plus isotope ratio mass spectrometer with CC-C III combustion interface and Trace gas chromatograph. | Thermo Scientific Delta V Plus |
| Size fractionated zooplankton d13C and d15N of individual amino acids from EXPORTS cruise RR1813 in August 2018 | Thermo Scientific MAT 253 isotope ratio mass spectrometer with GC Isolink combustion interface and Trace GC Ultra gas chromatograph. | Thermo Scientific MAT 253 |
| [DEPRECATED] Averages and standard deviation of stable isotopes (d13C and d15N) across species for all macrofauna found on each substrate (carbonate rocks, woods, and bones) of the colonization experiment held in Mound 12 | Stable isotopes measurements (d13C and d15N) were carried out using a Costech elemental analyzer coupled to a Micromass Iso-prime isotope ratio mass spectrometer (EA/IRMS) at Washington State University. | Micromass Iso-prime isotope ratio mass spectrometer |
| [DEPRECATED] Recovery parameters, isotopic composition, and elemental composition of HMW and LMW DOM collected in the North Pacific Subtropical Gyre on R/V Kilo Moana (KM1506, KM1515) during 2015 | Used to analyze 13C, 15N, and C/N | ThermoFinnigan Delta Plus XP isotope ratio mass spectrometer |