Gas chromatographic determination of organophosphorous pesticide residues in vegetable and fruits.

An analytical method for determination of organophosphorous pesticide residues in vegetable and fruits was developed.Samples were extracted by acetonitrile and detected by gas chromatography with a flame phtometric detector.The external standard method was used for quantification.The average recoveries ranged from 56.87% to 115.20%,and the relative standard deviations(RSD) were less than 15%.The detectable limits were from 11 to 36 ng·mL-1 for all pesticides.This method efficiently be used to separate and determine 20 kinds of organophosphorous pesticides in the vegetable and fruits.