水中总有机碳溶液标准物质的研制

Development of total organic carbon reference materials in water solution

目的研制一种适用于相关检测仪器校准及分析方法评价的国家有证标准物质。方法经过标准物质原材料的选择、特性量值的测量方法、标准物质的制备方法、均匀性检验、12个月稳定性考察以及定值测量,并对样品的均匀性、测量的分散性及其他因素引入的不确定度分量分析和确定后,计算得到水中总有机碳标准物质测量过程不确定度的合成结果。结果水中总有机碳溶液标准物质的均匀性良好,稳定性优异,标准值定值结果为1000 mg/L,相对扩展不确定度为2%。该标准物质已获批国家二级标准物质,编号为:GBW(E)082426。结论该标准物质性能良好,可满足食品、药品、日化、环境保护及化工产品研究和检测的需要,可用于相关仪器(总有机碳分析仪)的校准、分析方法评价,为统一相关量值发挥应有的作用。

Objective To develop a national certified reference material suitable for calibration and analysis of relevant instruments. Methods After a series of procedures including the selection of raw materials, the measurement of characteristic values, the preparation of reference materials, the homogeneity test, the 12-month stability investigation, the characterization measurement and the analysis and determination of uncertainty components were introduced by other factors, and a kind of total organic carbon reference materials in water was obtained. Results The certified reference material of total organic carbon solution in water had good uniformity and stability. The certified value of the reference material was 1000 mg/L, and the relative expanded uncertainty was 2%. This material had been approved as the second-class national certified reference material, which was numbered GBW(E)082426. Conclusion The certified reference material has good performance and can meet the needs of various area, such as food, medicine, daily chemical, environmental protection and chemical product research. It is expected to be used for calibration and analysis of related instruments (total organic carbon analyzer) and evaluation of analytical methods, so as to play its due role in the unification of relevant values.