breathalyzer

“By far, essentially the most neglected error in breath testing for alcohol is the pattern of breathing… The focus of alcohol changes considerably through the breath… The primary part of the breath, after discarding the lifeless house, has an alcohol concentration much decrease than the equivalent BAC (blood-alcohol focus). Whereas, the final part of the breath has an alcohol focus that’s much increased than the equal BAC. The last a part of the breath will be over 50% above the alcohol level… Thus, a breath tester reading of 0.14% taken from the last part of the breath might point out that the blood level is simply 0.09%.” 9(6) The Champion sixteen (1985).

breathalyzer