Jones A W
Forensic Sci. 1978 Jul-Aug;12(1):11-23. doi: 10.1016/0379-0738(78)90029-4.
The precision and accuracy of an Alcolmeter Pocket Model breath alcohol instrument have been investigated in experiments with human subjects under controlled conditions. The instrument response was zero in all tests with breath samples from alcohol-free subjects. The standard deviations of ethanol determinations in breath were +/-0.0722 mg/ml during ethanol absorption and +/-0.416 mg/ml during ethanol elimination. The standard deviation during the elimination phase increased with ethanol concentration in the sample, being +/-0.0416 mg/ml on average at a mean concentration of 0.420 mg/ml, corresponding to a coefficient of variation of 9.9%. The blood alcohol estimates using the Alcolmeter were somewhat too high during active absorption of ethanol, and too low during elimination, when a constant blood-breath alcohol ratio of 2100:1 was used to calibrate the instrument. During the elimination phase of ethanol kinetics and at a mean blood alcohol concentration of 0.50 mg/ml, the mean Alcolmeter result was 0.456 +/- 0.169 mg/ml with 95% confidence, i.e. varying between 0.287 and 0.625 mg/ml 95 times out of 100 tests at this critical blood alcohol level
在可控条件下，对人体受试者进行了实验，研究了Alcolmeter袖珍型呼气酒精测试仪的精密度和准确性。在对无酒精受试者的呼气样本进行的所有测试中，该仪器的响应均为零。在乙醇吸收过程中，呼气中乙醇测定的标准偏差为±0.0722毫克/毫升，在乙醇消除过程中为±0.416毫克/毫升。消除阶段的标准偏差随样本中乙醇浓度的增加而增大，在平均浓度为0.420毫克/毫升时，平均为±0.0416毫克/毫升，变异系数为9.9%。当使用2100:1的恒定血-呼气酒精比率校准仪器时，在乙醇的主动吸收过程中，使用Alcolmeter得出的血液酒精估计值略高，而在消除过程中则略低。在乙醇动力学的消除阶段，平均血液酒精浓度为0.50毫克/毫升时，Alcolmeter的平均结果为0.456±0.169毫克/毫升，置信度为95%，即在这个临界血液酒精水平下，每100次测试中有95次在0.287至0.625毫克/毫升之间变化。
