| A liquid liquid extraction gas chromatography coupled with mass spectrometry method was established to determine 20 kinds of organic pesticide in water.The choice of the extractant,dose,extraction time,dose of salting out agent and addition of organic modifier were optimized. The target components showed good linearity between 0.500 μg/L～50.0 μg/L.The detection limit of this method was 0.02 μg/L～0.19 μg/L，and the recoveries were between 90.5%～110%. Determine 7 samples of mixed standard solution,the RSD were from 0.3% to 9.1%.Standard examination method of drinking water（GB 5750 2006）were optimized,and the current method could meet the requirements of the determination. |
