Method and apparatus for testing gases, particularly breath...

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

G - Physics

01

N

G01N 27/403 (2006.01) G01N 27/416 (2006.01) G01N 33/497 (2006.01)

Patent

CA 2104090

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.

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