Column Extraction of Residues of Several Pesticides from Fruits and Vegetables: A Simple Multiresidue Analysis Method

Abstract

Abstract Homogeneous sample pulp, prepared from fruits and vegetables of different water content with or without additional water, Is adsorbed on the surface of activated Florisll to obtain a free-flowing powder, which is extracted In a glass column with ethyl acetate or methylene chloride-acetone (9 + 1, v/v). In most cases, no further cleanup Is necessary for subsequent gas chromatographic measurement. The recovery of pesticide residues, Including carbamate, organochlorlne, organophosphate, synthetic pyrethrold, triazlne, urea, and miscellaneous pesticides, Is generally ≥80%, and Is Independent of the sample material. The column extraction Is faster, less laborious, and less expensive than extractions based on traditional techniques, liquid partition, or other conventional chromatographic procedures.