摘要
建立了三氯卡班纯度标准物质的定值分析、不确定度评定和制备方法。采用两种不同原理的测试方法(质量平衡法和定量核磁共振法)对三氯卡班进行了纯度定值研究,运用液相色谱法对三氯卡班的分装样品进行均匀性检验和稳定性考察(包括短期运输条件稳定性和长期储存条件稳定性),并评定了不确定度。统计结果表明三氯卡班纯度标准物质在95%的置信区间具有良好的均匀性和稳定性。三氯卡班纯度标准物质定值结果的标准值和相对扩展不确定度分别为99. 3%和0. 5%(k=2),对于检验检测工作中三氯卡班的准确测量具有重要意义。
The method for value determination,uncertainty evaluation and preparation of purity reference material of triclocarban was established.The quantitative analysis was carried out by means of quantitative nuclear magnetic resonance( q NMR) and mass balance method simultaneously.The homogeneity examination and stability investigation( including short-term transport condition and long-term storage condition) of the triclocarbans sample was conducted with liquid chromatography method.The purity reference material of trichlorocarban had good uniformity and stability in the 95% confidence interval.The certified value of the purity reference material of triclocarban was 99. 3% with an relative expanded uncertainty of 0. 5%( k = 2),which would assure the accuracy of determination of triclocarban.
引文
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