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

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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.

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