摘要
介绍了一种新型汽车排气标准物质的研制方法。该标准物质是将一氧化碳、二氧化碳、1,3-丁二烯和氮气充装到气瓶中制备而成,采用称量法定值。对原料气体中的杂质进行了测量,对分析检测方法进行了比较研究,对标准物质的稳定性进行了考查。结果显示:该气体标准物质在12个月内的稳定性良好,浓度的相对扩展不确定度为0.5%(k=2)。该标准物质中,一氧化碳的浓度范围为2.000%~8.000%mol/mol,二氧化碳的浓度范围为9.400%~13.60%mol/mol,1,3-丁二烯的浓度范围为40.00×10^-6~160.0×10^-6 mol/mol,氮气为平衡气。
Preparation of a new type of certified reference materials for automotive exhaust gas was reported.The gas mixture was prepared by filling pure carbon monoxide,carbon dioxide,1,3-dibutene and nitrogen into cylinder.The certified value was from gravimetric method.The impurities in parent gas were determined.The measurement methods of gas mixtures were investigated.The long-term stability of this reference material was evaluated by classical stability study.Results showed it had good stability in twelve month.The relative expanded uncertainty is 0.5%(k=2)for the mole fraction of carbon monoxide 2.000%~8.000%mol/mol,carbon dioxide 9.400%~13.60%mol/mol and 1,3-dibutene 40.00×10-6~160.0×10-6 mol/mol.
作者
王德发
韩桥
张体强
刘智勇
WANG De-fa;HAN Qiao;ZHANG Ti-qiang;LIU Zhi-yong(National Institute of Metrology,Beijing 100029,China)
出处
《化学试剂》
CAS
北大核心
2020年第4期420-424,共5页
Chemical Reagents
基金
国家质量监督检验检疫总局量传项目(ALC1405-14)。
关键词
汽车排气
标准物质
称量法
不确定度
一氧化碳
二氧化碳
1
3-丁二烯
automotive exhaust gas
certified reference material
gravimetric method
uncertainty
carbon monoxide
carbon dioxide
1,3-dibutene
