Wisconsin Department of Transportation, Divison of State Patrol, Bureau of Transportation Safety, Chemical Testing Section, 3502 Kinsman Blvd., Madison, WI 53704, USA.
J Anal Toxicol. 2020 Mar 7;44(2):188-191. doi: 10.1093/jat/bkz050.
Breath alcohol measurement accuracy and precision quantification is a critical component of impaired driving prosecution and is required for laboratory accreditation. The Chemical Testing Section of Wisconsin's Department of Transportation conducted a bottom-up study to quantify uncertainty of breath alcohol measurements conducted on Intoximeter's EC/IR II instrument. After an exercise in combined uncertainty source identification, individual input values were either reported from National Institute of Standards and Technology traceable reference materials or quantified using instrument data from 2014 to 2018. From input values, an expanded uncertainty value of 4.58 × 10-3 g/210L was found that encompasses all identified sources with a 95% confidence interval.
呼气酒精测量的准确性和精密度的定量分析是酒后驾驶起诉中的一个关键部分，也是实验室认证所必需的。威斯康星州交通部的化学检测科进行了一项自下而上的研究，对 Intoximeter 的 EC/IR II 仪器进行的呼气酒精测量的不确定度进行了定量分析。在进行了一项组合不确定度源识别的练习后，使用从国家标准与技术研究院可追踪的参考物质中报告的单个输入值或使用 2014 年至 2018 年的仪器数据进行量化。从输入值中发现，扩展不确定度值为 4.58×10-3g/210L，涵盖了所有已识别的来源，置信区间为 95%。
