Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1990-10-03
1992-04-28
Hunt, Brooks H.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 91, G01N 3002
Patent
active
051087057
ABSTRACT:
Disclosed are a method and apparatus for high speed, selective detection of vapors of specific compounds, particularly nitrogen-containing compounds, utilizing, a bypass branch and high speed gas chromatography for improved selectively and sensitivity of detection. A system with two gas chromatographs (GC's) alternating in series with two pyrolyzers provides two time intervals of detection in a downstream detector, with the second time interval containing signals delayed and further separated relative to signals from the first time interval. The bypass branch, in diverting a portion of the flow of gas samples from passage through the second gas chromatograph and second pyrolyzer, avoids interferences in the first time interval of detection from non-GC-retained compounds decomposed in the second pyrolyzer. Also disclosed is an arrangement for rapid, precise heating of vapor concentrator tubes in which vapors are rapidly focussed and then injected into a GC, and for rapid, precise heating of the GC's.
REFERENCES:
patent: 3304159 (1967-02-01), Hinsvark
patent: 3403978 (1968-10-01), Favre
patent: 3430482 (1969-03-01), Dravnieks et al.
patent: 3518059 (1970-06-01), Levy
patent: 3589171 (1971-06-01), Haley
patent: 3607075 (1971-09-01), Wolf
patent: 3701632 (1972-10-01), Lovelock
patent: 3724170 (1973-04-01), Allen et al.
patent: 3877875 (1975-04-01), Jones et al.
patent: 3925022 (1975-12-01), Showalter et al.
patent: 3996002 (1976-12-01), Fine
patent: 3996004 (1976-12-01), Fine et al.
patent: 4054414 (1977-10-01), Grob et al.
patent: 4159894 (1989-07-01), Hu
patent: 4234315 (1980-11-01), Scott
patent: 4401763 (1983-08-01), Itoh
patent: 4467038 (1984-08-01), Scott
patent: 4650499 (1987-03-01), Scott
patent: 4778764 (1988-10-01), Fine
U.S. Ser. No. 081,912, filed Jul. 8, 1987, Rounbehler et al.
Grob, Robert L., "Moppen Practice of GC", 1977, pp. 124-125, Heftmann, E., Chromatography, 1983, pp. A118-A121.
Achter Eugene K.
Gernes David B.
Lieb David P.
Rounbehler David P.
Tafreshi Abdul
Hunt Brooks H.
Jenkins Daniel J.
Messenger Herbert E.
Thermedics Inc.
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