Method for determining the concentration of a substance in a gas

Details Method for determining the concentration of a substance in a gas Method for determining the concentration of a substance in a gas

1997-02-20

1998-06-23

Brock, Michael

Measuring and testing

Gas analysis

With compensation detail

73 233, 422 84, 436900, 436 68, 250343, G01N 2135, G01N 3398, G01N 33497

Patent

active

057707936

ABSTRACT:
The invention is directed to a measuring method for determining the concentration of a gas in a measurement sample with the aid of a combined measuring apparatus. The measuring apparatus includes a first infrared optical gas analyzer 1 as well as a second gas analyzer 2, which contains an electrochemical measuring cell 13. The measuring result of the electrochemical measuring cell 13 functions to correct the concentration, which is determined by the infrared optical gas analyzer 1, when the infrared optical reference measurement has already been performed on a measurement sample with this measuring sample not being free of the substance to be detected.

REFERENCES:
patent: 4976135 (1990-12-01), Stock
patent: 5272907 (1993-12-01), Hakala
patent: 5279795 (1994-01-01), Hughes et al.
patent: 5495744 (1996-03-01), Ueda et al.
"Alcohol, Drugs and Traffic Safety -T'95, vol. 1", G. Schoknecht et al, produced by NHMRC Road Accident Research Unit, The University of Adelaide 5005, Australia, 1995.

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