Determination of Eighteen Pesticide Residues in Coriopsis ticntoria by Gas Chromatography-tandem Mass Spectrometry

To quantitatively analye organophosphorus pesticides in C.ticntoria,18 kinds of organophosphorus pesticides in C.ticntoria were detected by Gas chromatography-tandem mass spectrometry.The gas chromatography-tandem mass spectrometry(GC-MS/MS)method was established for analysis of 18 organic phosphorus pesticides in C.ticntoria.The samples were extracted by acetonitrile,and cleaned up by SPE column;Then the extracts were determined with a MS/MS detector based on MRM,All of them were well separated within 15min.When the spiked average recoveries ranged from 71.2%to 93.5%.The RSDranged from 2.17%~6.20%,The pesticides were of good linearity in the range of 0.05~1.0mg/L.In the samples no pesticide residues were detected.The method was accurate and sensitive,which was suitable for analysis of various pesticides residues in C.ticntoria.