水中三硝基甲苯质量控制标准物质的研制

研制了以三硝基甲苯为主要成分的水质计量用标准物质。用先密后疏的方式检验样品的稳定性,对样品的均匀性、稳定性分别采用单因素方差分析方法和线性模型进行考察,组织多个国内权威实验室对样品进行协作分析定值,并对定值结果进行合成标准不确定度和扩展不确定度评估。样品的定值结果为0.983 mg/L,扩展不确定度为0.046mg/L。均匀性指标符合国家标准物质的技术要求,稳定性可达24个月以上。可满足水质三硝基甲苯分析量值传递的需要,达到分析测试中质量保证的目的和要求。

Development of Certified Reference Material of Trinitrotoluene in Water for Quality Control

The certified reference material of trinitrotoluene in water was developed.Its stability has been examined in regular order.The homogeneity of standard sample was evaluated by one-way ANOVA and the stability was evaluated by linear model.The certification was conducted by the cooperation of qualified in-network laboratories.The combined standard uncertainty and expanded uncertainty of standard sample were evaluated.The certified value was 0.983 mg/L and the extended uncertainty was 0.046 mg/L.The results indicated that the homogeneity in conformity with international standards for certified reference material.The stability was above 24 months.The reference material can be used as quality control sample for analysis of trinitrotoluene in water for transmission of measurement values.