Breath Tests for Alcohol

Abstract

Above a threshold level of 0.05 per cent of ethyl alcohol in the blood, the risk of collision involvement is a positively related monotonic function of blood ethanol level. State statutes recognize blood alcohol levels of 0.08 per cent (Utah), 0.10 per cent (22 states) and 0.15 per cent (27 states) or more as prima facie evidence of "driving under the influence"; the amount of alcohol in about 225 ml of whiskey circulating in the blood of a 70-kg person produces a concentration of 0.15 per cent.Ethanol distributes itself between the blood and gas phase of the lungs according . . .