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Our RGD
uses a mercuric oxide reaction tube and a mercury lamp in a heated UV detector
cell. When a reducing gas elutes from the column into the hot reaction tube,
it reacts with the mercuric oxide to form mercury vapor. As it flows through
the detector cell, the gaseous mercury absorbs the UV light from the mercury
lamp inside the cell. The change in transmittance is converted by the data
system into an absorbance output, which is proportional to the amount of
reducing gas. A carbon filter at the UV detector cell outlet traps the condensed
mercury vapor for safe disposal.
High concentrations of chlorinated and aromatic compounds can easily contaminate the mercuric oxide bed, resulting in the need for replacement. Reaction tubes are easily replaceable, and blank reaction tubes can be economically packed by the user. |
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RGD - Reduction Gas Detector |
49
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