Abstract: The forbidden,restricted,high-toxic,high-risk and customary pesticides were picked out asdetecting indexes according to the principals of risk management. 20 batches of Cissus hexangularis and Ixeridium chinense samples collected in different areas were detected. The factors affecting the extraction,purification and detection were optimized and the final condition was established as improve the accuracy of results. The results showed that the linear relationship of each component in the corresponding range was good in 50~500 ng/mL, the correlation coefficient ≥0.99, and the average recovery rate of pesticides was 48.6%~119.0%, which was in line with the trace detection requirements. The detecting indexes in the method cover most of the forbidden and restricted pesticides which are suitable for gas chromatography-tandem mass spectrometry, which is meaningful for the safety supervision of the Cissus hexangularis and Ixeridium chinense. With the advantage of rapidness and accuracy, this method can be used for routine determination of multi-pesticides in Cissus hexangularis and Ixeridium chinense.

Key words: Cissus hexangularis, Ixeridium chinense, prohibition and restriction of pesticides, GC-MS/MS