©2020 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2020 Biological and Chemical Oceanography Data Management Office.Liquid Waveguide Capillary Cells (LWCC) are optical sample cells that combine an increased optical pathlength (2-500 cm) with small sample volumes. They can be connected via optical fibers to a spectrophotometer with fiber optic capabilities. Similar to optical fibers, light is confined within the (liquid) core of an LWCC by total internal reflection at the core/wall interface. Ultra-sensitive absorbance measurements can be performed in the ultraviolet (UV), visible (VIS) and near-infrared (NIR) to detect low sample concentrations in a laboratory or process control environment. According to Beer’s Law the absorbance signal is proportional to chemical concentration and light path length.
| Dataset Name | PI-Supplied Description | PI-Supplied Name |
|---|---|---|
| Global distribution of phosphate using high sensitivity techniques from data aggregated from many studies between 1988-2017 | High sensitivity dissolved phosphate measurements done using either Liquid Waveguide Cells, magnesium induced precipitation (MAGIC), or solid phase extraction. | Liquid Waveguide Cells |
| Ammonium (NH4) concentrations from multiple HOE-DYLAN cruises from July to September 2012 (C-MORE project) | These low level nutrient measurements were made with an LWCC (not the usual autoanalyzer). The methods were developed by Susan Curless and Mariona Segura-Noguera. | Liquid Waveguide Capillary Cells |
| Nitrite (NO2) concentrations from multiple HOE-DYLAN cruises, R/V Kilo Moana KM1215, KM1216, KM1217, KM1218, KM1219, KM1220, at Station ALOHA from July to September 2012 (C-MORE project) | These low level nutrient measurements were made with an LWCC (not the usual autoanalyzer). The methods were developed by Susan Curless and Mariona Segura-Noguera. | Liquid Waveguide Capillary Cells |
| Urea concentrations from multiple HOE-DYLAN cruises, R/V Kilo Moana KM1215, KM1217, KM1219, at Station ALOHA from July to September 2012 (C-MORE project) | These low level nutrient measurements were made with an LWCC (not the usual autoanalyzer). The methods were developed by Susan Curless and Mariona Segura-Noguera. | Liquid Waveguide Capillary Cells |
| Concentrations of particulate phosphate in seawater collected during R/V Savannah cruise SAV-19-02 in the NW Atlantic Ocean in the Spring of 2019 | Measurements of SRP, DOP were performed using the Liquid wave guide capillary cell (2.5 m length path, model 3250, World Precision Instrument). | Liquid wave guide capillary cell (2.5 m length path, model 3250, World Precision Instrument). |
| Oceanographic data from 12 monthly cruises off the Israeli coast in the east Mediterranean conducted between Feb 2018 and Jan 2019 at a continental shelf station (~140m depth) and an open-deep water station. | 100 cm long flow cell (LWCC) | 100 cm long flow cell (LWCC) |
| Concentrations of soluble reactive phosphate in treatments amended with dissolved organic phosphate compounds in bioassay experiments (incubation 48h) with seawater from R/V Savannah cruise SAV-19-02 in the NW Atlantic Ocean in Spring of 2019 | Measurements of SRP were performed using the Liquid wave guide capillary cell (2.5 m length path, model 3250, World Precision Instrument) and using a conventional spectrophotometer (Genesys®,10 cm cuvette). | Liquid wave guide capillary cell (2.5 m length path, model 3250, World Precision Instrument) |