吹扫捕集/气相色谱法(NPD)测定水质乙腈的实验室间验证

INTERLABORATORY VALIDATION OF PURGE AND TRAP/GAS CHROMATOGRA-PHY(NPD)FOR WATER QUALITY-DETER-MINATION OF ACETONITRILE

对方法《水质乙腈的测定吹扫捕集/气相色谱法》(HJ 788—2016)中NPD吹扫捕集法测定水质乙腈在实验室间进行方法验证。在6家参与验证的实验室中,各实验室首先按照HJ 168的验证要求得到工作曲线、检出限、测定下限、精密度及准确度等数据。最后对所有数据汇总统计,计算出实验室间相对标准偏差、重复性限、再现性限、加标回收率最终值等数据。对比方法中的要求,证实实验室间验证结果符合方法要求,各实验室均有能力开展此项检测工作。

This paper carries out interlaboratory verifi-cation of purge and trap/gas chromatography for water quality-determination of acetonitrile presented in Water quality-Determination of Acetonitrile-Purge and Trap/Gas chromatography(HJ788-2016).The six lab-oratories participating in the verification obtained such data as the working curve,limit of detection,limit of determination,precision and accuracy according to the verification requirements of HJ168.Finally,all the data was collected for statistics and through calculation,the paper obtained the data covering the relative standard deviation,repeatability limit,reproducibility limit and the final value of recovery rate among the laboratories.Comparing the requirements in the methods,it is con-firmed that the interlaboratory verification results meet the method requirements and all the six laboratories can carry out such determination.