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.
出处
《化学试剂》
CAS
CSCD
北大核心
2012年第3期229-231,282,共4页
Chemical Reagents
关键词
苯
甲苯
有证标准物质
标准值
不确定度
benzene
toluene
certified reference material
standard value
uncertainty
