关键词: 吹扫捕集, 气相色谱法, NPD, 水质乙腈, 实验室间验证

Abstract: This paper carries out interlaboratory verification 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 laboratories 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 confirmed that the interlaboratory verification results meet the method requirements and all the six laboratories can carry out such determination.

Key words: purge-and-trap, gas chromatography, NPD, water quality-acetonitrile, interlaboratory verification