氮气中溴甲烷和1,2-二溴乙烷混合标准气体的研制  

Development of a Standard Mixture Gas of Bromomethane and 1,2-Dibromoethane in Nitrogen

作　　者：郭健[1] 钱萌[1] 范洁[1] 倪才倩 王帅斌[1] 李宁[1] 

机构地区：[1]环境保护部标准样品研究所,北京100029

出　　处：《化学试剂》2014年第1期57-60,共4页Chemical Reagents

基　　金：2013年环保公益项目科研专项资助项目(2009-09014)

摘　　要：介绍了溴代烷烃的危害,提出了氮气中溴甲烷和1,2-二溴乙烷混合标准气体的制备和定值方法。对制备的标准气体的重现性、均匀性和稳定性数据进行了分析和总结。结果显示,溴甲烷和1,2-二溴乙烷混合标准气体标准值为3μmol/mol,相对扩展不确定度为4%,在有效期12个月标准气体的均匀性良好,并与国内外同类标准气体具有较好的一致性。The dangers of brominated hydrocarbons had been introduced,and a method for the preparation of the standard mixture gas of bromomethane and 1,2-dibromoethane in nitrogen was developed. In this method, the reproducibility and the homogeneity and long-term stability of the standard mixture were evaluated. The results showed that bromomethane and 1, 2-dibromoethane in nitrogen had shown stability as long as 12 months and the expanded relative uncertainty of 4% at the concentration of 3 μmol/mol. The certified value of developed standard gas agreed with the similar standard gas from NIST and NIM.

关 键 词：溴甲烷 1 2-二溴乙烷 标准气体 均匀性 稳定性 不确定度 

分 类 号：X830.5[环境科学与工程—环境工程]