A Cold Vapor Atomic Fluorescent Spectrophotometer (CVAFS) is an instrument used for quantitative determination of volatile heavy metals, such as mercury. CVAFS make use of the characteristic of mercury that allows vapor measurement at room temperature. Mercury atoms in an inert carrier gas are excited by a collimated UV light source at a particular wavelength. As the atoms return to their non-excited state they re-radiate their absorbed energy at the same wavelength. The fluorescence may be detected using a photomultiplier tube or UV photodiode.
Cold Vapor Atomic Fuorescent Spectrometer (CVAFS) quantitatively measures volatile heavy metals, such as mercury. Gaseous mercury atoms are carried to the detector via inert gas, excited by a UV light source, and radiate the absorbed energy. The fluorescence is detected by either a photomultiplier tube or UV photodiode.
Cold Vapor Atomic Fuorescent Spectrometer (CVAFS) quantitatively measures volatile heavy metals, such as mercury. Gaseous mercury atoms are carried to the detector via inert gas, excited by a UV light source, and radiate the absorbed energy. The fluorescence is detected by either a photomultiplier tube or UV photodiode.
Cold Vapor Atomic Fuorescent Spectrometer (CVAFS) quantitatively measures volatile heavy metals, such as mercury. Gaseous mercury atoms are carried to the detector via inert gas, excited by a UV light source, and radiate the absorbed energy. The fluorescence is detected by either a photomultiplier tube or UV photodiode.