Measuring and testing – Gas analysis – Gas chromatography
Patent
1997-08-13
2000-11-21
Williams, Hezron
Measuring and testing
Gas analysis
Gas chromatography
73 2341, 73 2342, 73 232, 73 87, 73 89, G01N 3002, G01N 3090, G01N 3026, G01N 3000
Patent
active
061486574
ABSTRACT:
Method and apparatus for analyzing a breath sample provide user-friendly operation and analysis. The method and apparatus provide for automatic operation and coordination of operation of and absorbent sample tube, including desorbing means, a chromatographic precolumn, a chromatographic main column, a detector, a data processor, a sample receiving tube for receiving exhaled breath sample, a sample loop for aspirating a prescribed quantity of breath sample from the sample receiving tube, a sample valve, a standard gas reservoir, and a standard gas valve. All of the foregoing are operated automatically in such that start cycles, detector cycles, fault detection cycles, standardizing, analysis, shutdown and end cycles are performed in a way which allows for straightforward and simple measurement of breath sample by a user.
REFERENCES:
patent: 4133640 (1979-01-01), Clinton et al.
patent: 4849179 (1989-07-01), Reinhardt et al.
patent: 5458853 (1995-10-01), Porter et al.
patent: 5804142 (1998-09-01), Ito et al.
Cailleux et al.,Free Radical Research Communications, vol. 18, No. 6, pp. 323-327, 1993, "Is Pentane a Normal Constituent of Human Breath?".
Satoh Katsuhiko
Takenaka Akira
Yanagida Akira
Loo Dennis
Suzuki Motor Corporation
Takenaka Akira
Williams Hezron
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