Table 2 . End - Expiratory Breath Temperatures in Human

We studied several relevant biological aspects of breath-alcohol, analysis in 55 healthy men and women, after alcohol ingestion and during breathalcohol analysis with a typical 4th-generation instrument. We measured breath volumes, delivery pressures, and end-expiratory temperatures, with the following findings: End-expiratory temperature, 32.4135.69 #{176}C (mean, 34.53 #{176}C); forced vital Capacity, 1825-6550 ml (mean, 4038 ml): maximum expiration after normal inspiration, 1180-4550 ml (mean, 2730 ml); breath delivery pressure into a prototype Borg-Warner Model P-7 breath-alcohol apparatus, 8-50 inches H20 (mean, 21.3). These data and other pertinent findings from this study should assist in more rational design of breath-sampling systems in forthcoming breath-alcohol instruments and in developing valid procedures for their use.