甲苯中苯标准物质的研制  

Development of reference material of benzene in toluene

作　　者：张苏敏[1] 张毅[1] 代妍[1] 何丘[1] 

机构地区：[1]中国测试技术研究院,四川成都610021

出　　处：《化学试剂》2012年第3期229-231,282,共4页Chemical Reagents

摘　　要：以甲苯和苯为原料,采用称量-容量法研制了浓度为5 mg/mL的甲苯中苯溶液标准物质。所研制的标准物质通过均匀性检验、稳定性检验和与GBW(E)130101的比对,标准值的相对扩展不确定度为3%(k=2),有效期限为24 m。A kind of reference material of benzene in toluene was prepared using benzene and toluene as raw materials by Gravimetric-Volume Method.The standard value of concentration is 5 mg/mL.The reference material passed the homogeneity inspection,stability examination and intercomparison test between it and GBW（E）130101.The relative expanded uncertainty of the concentration standard value is 3%（k=2）.The validity period is 24 m.

关 键 词：苯 甲苯 有证标准物质 标准值 不确定度 

分 类 号：O625.11[理学—有机化学]