Apparatus for and method of collecting gaseous mercury and...

Details Apparatus for and method of collecting gaseous mercury and... Apparatus for and method of collecting gaseous mercury and...

G - Physics

01

N

G01N 7/16 (2006.01) G01N 30/00 (2006.01) G01N 33/00 (2006.01) G01N 1/28 (2006.01) G01N 1/34 (2006.01)

Patent

CA 2246564

A method and apparatus are provided for collecting a sample gaseous mercury, to differentiate between different gaseous mercury components. A quartz denuder module is provided having a coated extended surface for adsorbing reactive gaseous mercury. After collection of a sample, the coating it is heated to desorb the mercury as elemental gaseous mercury, which can then be detected and measured in a conventional analyzer. During the sampling phase, as reactive gaseous mercury is removed from the sample flow in the denuder, the sample can then be passed to the 10 analyzer for detection of elemental gaseous mercury. Where particulate mercury may be present, a filter trap can be provided downstream from the denuder. Separate steps can be provided for heating and pyrolysis of particulate mercury, for separate measurement in the analyzer. The pump module can be configured to generate zero air as a flushing gas. The denuder can be mounted in separated module, so that it can be mounted in desired external location, remote from other instrumentation.

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