我国省级疾病预防控制中心生活饮用水中5种有机物检测能力实验室间比对结果评价

Evaluation on the capability of testing carbon tetrachloride,benzene,methylbenzene,dimethylbenzene,p'p- DDT of the provincial centers for disease control and prevention

目的采用实验室间比对质量控制考核方法评价各省级疾病预防控制中心生活饮用水中有机物指标四氯化碳、苯、甲苯、二甲苯和农药指标p’p-DDT的检测能力。方法将参加实验室分成2组,每组约16个实验室,不同浓度水平双样设计,采用稳健统计方法对实验室检测能力进行评价。结果全国30家省(直辖市、自治区)疾病预防控制中心参加了本次实验室间比对,全部参数均获得满意结果的实验室20个,占66.7%;存在可疑结果的实验室8个,占26.7%;存在离群结果的实验室2个,占6.7%。结论参加本次实验室间比对的省级疾病预防控制中心,大多数具有生活饮用水中有机物指标四氯化碳、苯、甲苯、二甲苯和农药指标p’p-DDT的检测能力。

Objective （CDC） provincial divisions To evaluate the Centers of Disease Control and Prevention＇ s ＇ capabilities of detectingconcentrations of organic parameters such as carbon tetrachloride, benzene, methylbenzene, dimethylbenzene and pesticide parameter ofp＇p -DDT in drinking water, by adopting a quality control assessment methodology of interlaboratory comparison. Methods All laboratories had been divided into 2 groups, each of which contained aboutl6 laboratories. Organic concentrations and pesticide concentrations were assigned to 2 sample groups. Testing capabilities of the laboratories were evaluated through the use of robust statistical methods. Results Thirty CDC provincial divisions, including municipalities under the central government and in autonomous regions, participated in this interlaboratory comparison. Twenty laboratories obtained positive results in all parameters, accounting for 66.7%. Eight laboratories＇ results were suspicious, accounting for 26.7%. Finally, 2 laboratories produced outliers, accounting for 6.7%. Conclusions The majority of provincial CDC participants in this interlaboratory comparison are capable of testing the concentrations of organic parameterssuch as carbon tetrachloride, benzene, methylbenzene, dimethyl benzene, and pesticide concentrations of p＇ p-DDT in drinking water.