METHOD AND APPARATUS FOR DETECTING MINUTE CONCENTRATIONS OF GASES AND VAPORS
An apparatus is designed for detecting a trace constituent in a gaseous mixture with an ionization chamber. In the apparatus, the mixture is exposed to a reagent as it enters the chamber, whereby nascent particulate matter forms from the constituent-reagent reaction; the effect of the particulate matter on the ionization current enables the concentration of the constituent to be measured. The following compounds may be determined in this way: hydrogen halides, NO, SC/ sub 2/, halogenrted hydrocarbons, and HCN. NH3 is the reagent for all except HCN, for which HCI is the reagent, while the halogenated hydrocarbons must be pyrolyzed beforehand to yield a hydrogen halide which will react with NH/sub 3/. The ionization chamber is described at length in Patent No. 860, 577. (D.L.C.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-011288
- OSTI ID:
- 4087460
- Report Number(s):
- GB 860576
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United Kingdom
- Language:
- English
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