Section 75 Blowing Technique, Volume, and Flow Rate
Library | DWI Experts and the Science of Chemical Tests 2014 |
Because people have different rates, force, and duration of blowing within the accepted criteria range of evidential breath-alcohol testing machines, it has been acknowledged that the normal biological variability for breath-alcohol testing is +/- 0.020 g (grams)/210 L (liter). See Kurt M. Dubowski & Natalie A. Essary, Breath-Alcohol Analysis on Duplicate Samples (1986), Proceedings of the 10th International Conference on Alcohol, Drugs and Traffic Safety (1987). With a normal biological variability of +/-...
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