安徽省饮用水中铅镉检测能力验证结果分析  

Analysis of the capacity validation results of testing of lead and cadmium in drinking water in Anhui Province

作　　者：李家涛[1] 李建伟[1] 周勤文[1] 李晓铷[1] 邢红旗[1] 李昌安[1] 董骏[1] 陈煚[1] 

机构地区：[1]合肥市疾病预防控制中心,安徽合肥230022

出　　处：《现代预防医学》2015年第22期4190-4193,共4页Modern Preventive Medicine

摘　　要：目的为了提高水质检测实验室检测结果的准确性与可比性以及检验机构的整体能力,识别水质检测实验室间存在的差异。方法选用自制铅镉标准样品,分别采用F检验和∣x-y∣≤0.3σ准则法检验样本的均匀性和稳定性,采用稳健统计技术"Z比分数"的统计方法对饮用水中铅、镉的检测结果进行分析。结果此次样品共发放至全省各相关的检测机构86家实验室,其中铅检测结果满意的有77家,满意率为89.5%(77/86);镉检测结果满意的有62家,满意率为87.3%(62/71)。结论全省水质检测实验室铅镉总体检测能力较高,部分实验室检测技术水平有待提高。Objective The study aimed to improve the accuracy and reliability of testing results provided by the water quality testing laboratory and overall capacity of the testing institutions, and to identify the differences among different water quality testing laboratories. Methods Self-prepared lead and cadmium standards were used to examine the homogeneity and stability of the standards by using the F test and∣x-y∣≤0.3σ criteria, respectively. The testing results of lead and cadmium in drinking water were analyzed by robust ＂Z ratio＂ statistics. Results The standards were sent to 86 laboratories of relevant testing institutions in the Province, among which 77 laboratories produced satisfactory lead testing results and 62 laboratories produced satisfactory cadmium testing results, resulting in satisfaction rates of 89.5%（77/86） and 87.3%（62/71）, respectively. Conclusion While capacities of water quality testing laboratories around the Province in detecting lead and cadmium are high, detection techniques used in some of the laboratories need to be improved.

关 键 词：饮用水 铅 镉 能力验证 Z比分数 

分 类 号：R155.33[医药卫生—营养与食品卫生学]