Method and device for determining the alcohol content of a perso

Details Method and device for determining the alcohol content of a perso Method and device for determining the alcohol content of a perso

1980-02-15

1981-07-07

Smith, William F.

Chemistry: physical processes

Physical processes

Crystallization

422 59, 422 85, 422 84, 422 88, 23907, G01N 2762, G01N 122

Patent

active

042772516

ABSTRACT:
A method of determining the alcohol content of air exhaled by a person using a flow through testing tube having an alcohol indicating material therein and a sampling tube to which the air is directed which has a material therein for retaining the alcohol of the breathing air and also using a suction pump comprises cooling the sampling tube, passing the exhaled air through the cooled sampling tube, measuring a volume of the air passing through the cooled sampling tube, heating the sampling tube and connecting the suction pump to the sampling tube to suck flushing air through the heated tube and then through the testing tube. The sampling tube advantageously contains a silica gel to retain the alcohol therein. The volume measuring device may be a measuring bag.

REFERENCES:
patent: 2826908 (1958-03-01), Skarstrom
patent: 3305000 (1967-02-01), Bullen et al.
patent: 3522009 (1970-07-01), Borkenstein
patent: 3697418 (1972-10-01), Johnson
patent: 3734692 (1973-05-01), Lucker et al.
patent: 3746512 (1973-07-01), Kamei et al.

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