全国实验室生活饮用水中硝酸盐氮测定的能力验证研究

发布时间：2017-12-31 16:18

本文关键词：全国实验室生活饮用水中硝酸盐氮测定的能力验证研究　出处：《环境与健康杂志》2016年11期 　论文类型：期刊论文

【摘要】：目的通过能力验证计划,对全国实验室的生活饮用水中硝酸盐氮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t检验法分别对其进行均匀性检验和稳定性检验。将全国多个行业系统所属的608家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。结果获得满意结果的实验室541家,结果满意率为89.0%;可疑结果的有20家,结果可疑率为3.3%;离群结果的有47家,结果离群率为7.7%。结论能力验证统计结果表明,国内实验室的生活饮用水中硝酸盐氮检测能力总体较好,少部分实验室的检测能力有待改进提高。
[Abstract]:Objective through proficiency testing program, analyze and evaluate the detection ability of nitrogen and nitrate content of drinking water national laboratories. Methods used in the validation plan ability measured sample preparing method reference two standard substance, using single factor variance analysis and t test method of the homogeneity test and stability test. 608 laboratories submitted to the national multiple industry system belongs to the analysis of the result of iterative robust statistics, using Z score evaluation in the laboratory test results. The results obtained satisfactory results of the laboratory 541, the satisfaction rate was 89%; there are 20 suspicious results, the suspicious rate is 3.3%; the outlier results are 47, the outlier rate was 7.7%. conclusion the ability to verify the statistical results showed that the better domestic laboratory of nitrate nitrogen in drinking water detection ability overall, a small part of the experiment The testing ability of the room needs to be improved.

【作者单位】：中国疾病预防控制中心环境与健康相关产品安全所;
【基金】：国家认监委2014年A类能力验证计划(项目CNCA-14-A05)
【分类号】：R123.1
【正文快照】： 硝酸盐氮为生活饮用水水质常规项目无机非金属毒理指标,硝酸盐氮在水中经常被检出,含量过高可引起人工喂养婴儿的变性血红蛋白血症,较年长人群某些癌症(膀胱癌、卵巢癌、非霍奇金淋巴癌等)与极高浓度的硝酸盐含量有关[1-3],因此硝酸盐氮是生活饮用水水质安全评价的重要参数之

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