Chemistry: analytical and immunological testing – Hydrocarbon
Patent
1995-08-18
1997-09-09
Warden, Jill
Chemistry: analytical and immunological testing
Hydrocarbon
422 54, 422 83, 422 90, 436124, 436133, 436141, 436143, 436153, 436154, 436100, 436101, G01N 2173
Patent
active
056656041
ABSTRACT:
A halogenated hydrocarbon (HHC) detector is formed from a silent discharge (also called a dielectric barrier discharge) plasma generator. A silent discharge plasma device receives a gas sample that may contain one or more HHCs and produces free radicals and excited electrons for oxidizing the HHCs in the gas sample to produce water, carbon dioxide, and an acid including halogens in the HHCs. A detector is used to sensitively detect the presence of the acid. A conductivity cell detector combines the oxidation products with a solvent where dissociation of the acid increases the conductivity of the solvent. The conductivity cell output signal is then functionally related to the presence of HHCs in the gas sample. Other detectors include electrochemical cells, infrared spectrometers, and negative ion mobility spectrometers.
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Coogan John J.
Monagle Matthew
Carrillo Sharidan
The Regents of the University of California, Office of Technolog
Warden Jill
Wilson Ray G.
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