A multiresidue analytical method for determining organochlorine,organophosphorus, dinitrophenyl and carbamate pesticides in apples

A multiresidue analytical method for the simultaneous extraction of organochlorine, organophosphorus, dinitrophenyl and carbamate pesticides from apples is presented. Extraction is performed with a mixture of toluene and hexane. After clean-up on a Florisil column, and in some cases conversion to derivatives, quantitative determination is performed by electron-capture gas chromatography. Qualitative verification is performed by thin-layer chromatography or gas chromatography-mass spectrometry.