Electricity: measuring and testing – Using ionization effects – For analysis of gas – vapor – or particles of matter
Patent
1997-09-11
1999-04-06
Do, Diep N.
Electricity: measuring and testing
Using ionization effects
For analysis of gas, vapor, or particles of matter
324459, 73 2802, 436 35, G01N 2762
Patent
active
058923640
ABSTRACT:
A method and apparatus for the detection of trace constituents in inert gases. Three modes of operation of the said invention are most preferred. In the first embodiment, a dielectric barrier discharge cell receives an inert gas, excites the gas, and the gas is then allowed to mix with additional gas in which the constituent to be measured is entrained. Energy is then passed from the excited states of the inert gas to the analytes of interest creating charged analytes of interest which are then measured through the use of commercial electrometers. In a second embodiment, the dielectric barrier discharge device receives the analyte entrained within the inert gas and the gas and, in some cases, the analytes are excited. The excited species then pass on and any resulting ionized species are then detected through the use of an electrometer. In the third embodiment, the analyte is entrained within the inert gas in the presence of a second gaseous constituent, reacts with the gaseous constituent, and then passes on to a thermionic emitting source. The altered constituent is then selectively ionized by the thermionic source and this ion is measured by an electrometer.
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Do Diep N.
Myers Jeffrey D.
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