氮中丙烷、一氧化碳、二氧化碳混合气体标准物质的研制及其不确定度评定  

Preparation and uncertainty analysis of mixed gas reference material of propane, carbon monoxide and carbon dioxide in nitrogen

作　　者：卓继斌 钟金德 Zhou Jibin;Zhong Jinde(Fujian Metrology Institute,Fujian Provincial Key Laboratory of Force Measurement)

机构地区：[1]福建省计量科学研究院,福建省力值计量测试重点实验室

出　　处：《上海计量测试》2022年第4期34-38,共5页Shanghai Measurement and Testing

摘　　要：叙述了通过比较定值法研制氮中丙烷、一氧化碳、二氧化碳混合气体标准物质的过程,并用F检验法和回归曲线法考察了气瓶压力和贮藏时间的变化对混合气体中各组分量值的影响。对定值分析过程、均匀性、稳定性引入的不确定度进行了评定,研制的目标混合气体标准物质相对扩展不确定度U=1.5%(k=2)。This manuscript describes the process of preparing a gas mixture of propane, carbon monoxide and carbon dioxide in nitrogen by the comparative calibration method, and the effects of changes in cylinder pressure and storage time on the values of the components in the gas mixture were investigated by the F-test and regression curve method. The uncertainties introduced by the preparation process, homogeneity and stability were evaluated, and the relative extended uncertainty U=1.5%(k = 2) of the target mixture gas reference material was developed. The technical specifications met the expected objectives of the project.

关 键 词：机动车排气 混合气体 标准物质 不确定度 

分 类 号：TQ421.31[化学工程] X831[环境科学与工程—环境工程]