Electricity: measuring and testing – Using ionization effects – For analysis of gas – vapor – or particles of matter
Patent
1994-01-03
1995-02-28
Strecker, Gerard R.
Electricity: measuring and testing
Using ionization effects
For analysis of gas, vapor, or particles of matter
324455, 73 2802, G01N 2762, G01N 2768
Patent
active
053940920
ABSTRACT:
A spark detection apparatus is set forth and incorporates a closed chamber for receiving a carrier gas flowing therethrough between inlets and outlets, and the carrier gas is exposed to a pair of electrodes forming a spark across the chamber and through the carrier gas. One component of the carrier gas is argon. The sample to be analyzed is injected into the carrier gas. One reaction involves the formation of metastable argon which upon decay serves as a source of ionizing radiation which reacts with sample compounds producing detectable events. These events are used to identify and quantify unknown compounds contained in the sample. The methods and apparatus are especially useful in measuring pollutant compounds in atmospheric samples since the ionizing radiation emitted from the decay of metastable argon is below the ionization potential of the major constituents of air. This greatly enhances the signal-to-noise ratio for detecting impurity compounds when the detection system is used to monitor air quality. Air is not energized.
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patent: 5153519 (1992-10-01), Wentworth et al.
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Stearns Stanley D.
Wentworth Wayne E.
Do Diep
Strecker Gerard R.
Valco Instruments Co., Inc.
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