Gasmet™ CMM  features a cold vapor atomic fluorescence (CVAF) spectrometer with integrated high-temperature converter to effectively transform different mercury compounds to elemental mercury. Intense radiation in UV range (at 254 nm) from a mercury lamp is then directed to the sample gas. Fluorescent light emitted by atomic mercury in the sample gas is then measured at the same wavelength enabling exceptionally low detection limits.

CVAF spectrometer

The CVAF spectrometer is highly specific for atomic mercury vapor (Hg0) and the measurement of total mercury including mercury compounds such as mercury chloride (HgCl2) is achieved by placing a converter in front of the sample cell so that all gaseous mercury in the sample is converted to Hg0 just before the measurement.