Study on Rapid Determination for 30 Organochlorine and Pyrethroid Pesticide Multi-residues in Food.

Objective To set up a rapid determination for 30 organochlorine and pyrethroid pesticide multi-residue in food(vegetables,fruits, foodstuffs and teas).Methods The sample was extracted with acetonitrile,then pre-purified by passing through Solid-phase Extraction Florisil,the residues of 30 organochlorine and pyrethroid pesticide in food(vegetables,fruits,foodstuffs and teas) were identified and quantitated simultaneously by gas chromatography with dual-column and ECD.Results In HP-5 Column and DB-17 Column,30 pesticides were separated from each other,and the liner range of standard curve were broad and the liner relationship of standard curve were good(r=0.99~0.9999),the average recoveries of the three levels of 30 organochlorine and pyrethroid pesticide were 66.5%～116.2% in vegetables,fruits,foodstuffs and teas,the coefficient of variation(CV) were 0.7%～14.2%,the ranges of minimum detection limits were 0.08～26μg/kg.Conclusions This method is of good accuracy,high repeatability,precision and less interferences from impurities,simple and fast.The cost is low and applying scope is wide.This method has met the requirement of analysis method of pesticide multi-residue.