【摘要】 目的根据2008年生活饮用水中铁、锰检测能力验证的报告结果和检测方法,探讨影响检验结果的因素,提供生活饮用水中铁、锰测定的关键控制点。方法对全国30个省(市)、自治区180个实验室参加的"生活饮用水中铁、锰检测能力验证"结果和所用方法进行分析,寻找不满意结果产生的原因。结果首次报告结果被评议为合格的143家实验室中,铁测定合格率为85.56%,锰测定合格率为87.71%。除只有3个实验室用ICP-MS法,不做统计外,AAS法、ICP-AES法、化学法测定铁的合格率分别为76.00%、88.89%、93.75%;测定锰的合格率分别为79.23%、94.29%、72.73%。采用稳健统计方法对参加2008年生活饮用水中铁、锰检测能力验证的37家结果不满意实验室进行统计,铁、锰同时|ZB|≥3的实验室为11个。结果反映出实验室的系统误差所占比例较大。结论经过复测,参加能力验证的实验室97.2%可以准确检测生活饮用水中铁、锰。系统误差较大、实验空白高、基体干扰等实验关键控制点的掌控能力不高是实验室所报结果不满意的主要原因。更多还原

【Abstract】 Objective To analyse the results and methods on proficiency testing(PT) for determination of Fe, Mn in drinking water and to discuss the influencing factors.With a view to the laboratory for accurate determination of drinking water iron and manganese to provide technical support.Methods 180 labs from 30 provinces( cities), autonomous regions took part in the PT.Based on methods of PT,statistical analysis of the results,to find the causes of dissatisfactory results.Results According to the results of the report for the first time,the PT showed that 85.56% labs presented satisfactory results of determination of Fe and 87.71% labs presented satisfactory results of determination of Mn.In addition to ICP /MS,it showed that 76.00% ,88.89% ,93.75% respectively presented satisfactory results of the methods of AAS ,ICP-AES and chemical of determination of Fe.It showed that 79.23% , 94.29% ,72.73% respectively presented satisfactory results of the methods of chemical ,AAS and ICP-AES of determination of Mn.The initial results of 37 labs had dissatisfactory.Results of statistics showed that iron, manganese at the same time | ZB | ≥ 3 for the 11 labs.Conclusion Most of the labs that took part in the PT have good competence in analyzing Fe,Mn.The main reasons of the dissatisfactory results were larger systematic errors, experimental blank,matrix interference and feeble control ability of the key point of the experiment.更多还原