Research on determination of 36 organphosphorus pesticide residues in fruits and vegetables by gas chromatography with gel permeation chromatography clean-up

Objective:To develop a method for the determination of 36 OPPs in fruits and vegetables by GC-PFPD with GPC.Methods: The samples were extracted by acetonitrile and purified with dispersive solid-phase extraction and GPC,then detected by GC-PFPD.Results:36 OPPs were separated well from each other,the correlation coefficients were all above 0.993,the values of recoveries and RSDs were found to be in the range of 70.2%~117.4% and 1.35%~12.4% respectively,the detection limits were between 0.003 mg/kg~0.009 mg/kg.Conclusion: The method is sensitive,low cost and simple and applicable to the lab for daily monitoring and inspection.