Determination of acetochlor in drinking water by solid phase extraction-gas chromatography-mass spectrometry
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.
Solid phase extractionGas chromatography-mass spectrometryAcetochlorDrinking water