Abstract: An analytical method for the simultaneous determination of chlorpyrifos, cypermethrin and fenvalerate residues in vegetables was established by gas chromatography. HP-5 quartz capillary column (30m × 0.25mm, 0.25μm) and electron capture detector were used for measurement, and the reference materials of the three pesticides were mixed into a mixed standard solution to make a concentration range of 0.02 ～ 0.20mg · L ^ -1 calibration curve, the correlation coefficients of the three curves are 0.99994, 0.9999 and 0.9998 respectively. The sample recovery rate was 85.3% 0 ～ 93.1%, the relative standard deviation was 0.13% ～ 2.16%, and the detection limits were 0.0001.002 and 0.002mg · kg respectively.
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