水中氨氮检测的实验室间比对评估
Inter-Laboratory Comparison on Determination of Ammonia-Nitrogen in Water
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摘要:
目的 为检验广西水质检测实验室对水中氨氮检测的技术能力,保障饮用水水源地安全,组织开展52 家实验室间比对。 方法 采用四分位稳健统计法进行数据分析和结果评价。 结果 水中氨氮检测的实验室间Z 比分数(ZB)满意率为84.6%;实验室内Z 比分数(ZW)满意率为82.7%。 结论 参加本次实验室间比对的实验室的水中氨氮检测能力总体水平较好。 Abstract:Objective To assess the competence of detecting ammonia-nitrogen in water quality testing laboratories in Guangxi and ensure the safety of drinking water sources by conducting a comparison of the detection results between 52 laboratories. Methods The results were analyzed and evaluated by robust statistical technique using quartiles. Results The ratio of laboratories with satisfied inter-laboratory Z-score (ZB) was 84.6%, and the ratio of laboratories with satisfied innerlaboratory Z-score (ZW) was 82.7%. Conclusion Most selected laboratories show a qualified competence in detecting ammonia-nitrogen in water.