Objective To develop a method for the determination of acetochlor in drinking water by solid-phase extraction(SPE)-gas chromatography-mass spectrometry(GC-MS).Methods The samples of drinking water were extracted by automatic solid phase extraction system,the eluent was concentrated to 1.0 ml,determined by gas chromatography-mass spectrometry,and quantified by internal standard method.By optimizing injection flow rate,volume and elution flow rate,the results of detection limit,precision,accuracy and standard sample were evaluated.Results Acetochlor had a good linear relationship in the range of 10-250 μg/L,and the correlation coefficient was 0.999 5.The limit of detection of acetochlor was 0.006 2 μg/L,and the limit of quantitation was 0.025 μg/L.The recoveries of internal standard method were in the range of 95.2％-99.8％,the relative standard deviations were in the range of 1.3％-1.6％.Conclusion The method has high precision and accuracy,good separation of target peak and internal standard,and is applicable to the determination of acetochlor in drinking water.
关键词
固相萃取/气相色谱-质谱/乙草胺/生活饮用水
Key words
Solid phase extraction/Gas chromatography-mass spectrometry/Acetochlor/Drinking water
维普
万方数据