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目的通过能力验证计划,对全国实验室的生活饮用水中硼含量检测能力进行分析和评价。方法能力验证计划中使用的被测样品参考二级标准物质制备方法制备,采用单因子方差分析法和线性拟合趋势分析法分别对其进行均匀性检验和稳定性检验。将各参加实验室提交的结果进行迭代稳健统计分析,采用z比分数评定各参加实验室的测试结果。结果全国共244家实验室参加该项能力验证,获得满意结果的实验室236家,结果满意率为96.7%;可疑结果的有4家,结果可疑率为1.6%;离群结果的有4家,结果离群率为1.6%。结论能力验证统计结果表明,国内实验室的生活饮用水中硼检测能力总体良好,极少部分实验室的检测能力有待改进提高。
Objective To analyze and evaluate the detection ability of boron in domestic drinking water in laboratories through capacity verification plan. Methods The test samples used in the proficiency testing program were prepared by reference to the preparation of secondary standard materials. Univariate analysis of variance and linear fitting trend analysis were used to test the uniformity and stability respectively. The results submitted by participating laboratories for iterative robust statistical analysis, using z score to assess the participation of the laboratory test results. Results A total of 236 laboratories in 244 labs across the country participated in the proficiency testing and obtained satisfactory results with a satisfactory rate of 96.7%, four suspicious results with a suspicious rate of 1.6% and four outliers , The result is an outgo rate of 1.6%. Conclusion The results of proficiency testing show that the boron detection ability of drinking water in domestic laboratories is generally good, and the detection ability of a few laboratories needs to be improved and improved.