摘要
经均匀性和稳定性检验证明苯、甲苯、邻二甲苯含量均匀，量值稳定性大于一年，经多家实验室定值，取得了准确的特性量值（μｇ），低含量：苯３８．８±３．７，甲苯９８．６±４．４，邻二甲苯９７．１±１．９；高含量：苯８６．０±６．３，甲苯１９４±７，邻二甲苯１９５±５。此标准物质已被国家技术监督局批准为标准物质。
his certified reference material (CRM) of benzene,toluene and o xylene in charcoal is used for quility control and calibration of analytical instruments in the determination of benzene,toluene and o xylene in air.Homogeneity of benzene,toluene and o xylene concentrations in the CRM was testes by GC.The stability of the CRM was assessed for one year.The certified values are based on analysis made by a group of independent laboratoies using GC method.
出处
《卫生研究》
CAS
CSCD
北大核心
1998年第4期285-286,共2页
Journal of Hygiene Research
基金
卫生部科研基金
关键词
标准物质
苯
甲苯
邻二甲苯
活性炭
certified reference material, benzene, toluene, o xylene
