Method and apparatus for testing gases, particularly breath alco

Details Method and apparatus for testing gases, particularly breath alco Method and apparatus for testing gases, particularly breath alco

1992-08-17

1995-02-28

McMahon, Timothy M.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

422 84, G01N 33497

Patent

active

053934954

ABSTRACT:
A method and apparatus for measuring the concentration of breath alcohol or other reactants is provided in which a breath sample is introduced to a fuel cell, wherein the number of electrons from the fuel cell resulting from oxidation of the alcohol in the breath rises to a peak and thereafter falls to a substantially steady minimum base to form a curve. The present method is based on the discovery that this curve, regardless of reactant concentration or age of fuel cell, is a log-normal distribution curve.

REFERENCES:
patent: 3994799 (1976-11-01), Yao
patent: 4128884 (1978-12-01), England
patent: 4487055 (1984-12-01), Wolf
patent: 4770026 (1988-09-01), Wolf
patent: 5048321 (1991-09-01), Chow

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