作 者: ; ; ; ; (冯群芝); (王惠平); (马明);
机构地区: 国家烟草质量监督检验中心
出 处: 《烟草科技》 2013年第9期50-53,共4页
摘 要: 研制了烟碱纯度标准物质。采用国际标准方法 ISO 13276:1997《烟草及烟草制品烟碱纯度的测定硅钨酸重量法》,由6家实验室合作对烟碱标准物质进行了定值。结果表明:①烟碱标准物质的定值结果为98.5%,扩展不确定度为0.6%。②该标准物质的均匀性检验结果良好,考察期内该标准物质稳定,符合国家二级标准物质技术要求。 Reference material (RM) of nicotine purity was prepared. Six laboratories collaboratively confirmed quantitatively the purity of the prepared material by the method recommended by ISO 13276:1997 "Tobacco and tobacco products-Determination of nicotine purity-Gravimetric method using tungstosilicic acid". The results showed that: 1) The purity of RM of nicotine was 98.5% with the expanded uncertainty of 0.6%. 2) The prepared RM featured good homogeneity test result and higher stability during investigating period, and satisfied the technical requirements of national second grade reference material.