Method of and apparatus for testing breath alcohol

Details Method of and apparatus for testing breath alcohol Method of and apparatus for testing breath alcohol

1987-01-15

1988-09-13

Tokar, Michael J.

Measuring and testing

Gas analysis

Gas chromatography

422 84, 436900, G01N 2716

Patent

active

047700262

ABSTRACT:
Apparatus for measuring breath alcohol content by oxidizing breath alcohol in a fuel cell and utilizing substantially all of the electrons produced by said oxidation as a measure of the amount of alcohol contained in the sample. A working embodiment of the invention includes a resistor across terminals of the fuel cell with a resistance that is high enough to permit the voltage from the fuel cell to be accurately measured but low enough to permit the voltage to fall to a substantially steady minimum voltage within a time on the order of two minutes or less. The method of measuring breath alcohol concentration comprises integrating the entire area under the curve generated by the fuel cell output voltage between the beginning of oxidation of the alcohol in the fuel cell and the reaching of the substantially steady minimum.

REFERENCES:
patent: 3823601 (1974-07-01), Hoppesch
patent: 4032856 (1977-06-01), Goldner
patent: 4297871 (1981-11-01), Wright et al.
patent: 4487055 (1984-12-01), Wolf

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