Gas detection

Details Gas detection Gas detection

1979-07-20

1981-03-24

Marcus, Michael

Chemistry: physical processes

Physical processes

Crystallization

23927, 422 52, G01N 2176

Patent

active

042577772

ABSTRACT:
The invention comprises a method and apparatus for the detection, or detection and concentration determination, of nitric oxide in a gas mixture, particularly in tobacco smoke. The apparatus comprises sampling means operable to isolate a predetermined amount of the gas mixture and pass it to a reaction chamber, means for supplying to that chamber a further gas chemiluminescently reactable with the nitric oxide, and detection means responsive to luminescence emitted in the said chamber. The method comprises operating sampling means to isolate a predetermined amount of the gas mixture and supply it to a reaction chamber, supplying to that chamber a further gas chemiluminescently reactable with the nitric oxide, and operating means to detect luminescence in the said chamber. A carrier gas may be used for transferring the predetermined amount of gas mixture from the sampling means to the reaction chamber.

REFERENCES:
patent: 3520660 (1970-07-01), Webb
patent: 3528435 (1970-09-01), Morrissey
patent: 3586007 (1971-06-01), Kelley et al.
patent: 3647387 (1972-03-01), Benson et al.
patent: 3996002 (1976-12-01), Fine
patent: 3996003 (1976-12-01), Fine et al.
patent: 4049383 (1977-09-01), Burton et al.
patent: 4113434 (1978-09-01), Tanaka et al.

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