Analysis of pesticide residues in wine by solid-phase extraction and gas chromatography with electron capture and nitrogen-phosphorus detection

A feasible and reproducible method for multiresidue analysis of several com mon pesticides, of different polarities, in wine samples is proposed. The m ethod combines a solid-phase extraction on polymeric cartridges eluted with ethyl acetate and a gas chromatographic determination using electron captu re and nitrogen-phosphorus detection. To avoid the matrix effect, previous washing of the cartridges with a mixture of water-2-propanol (90:10) and fu rther clean-up of the extract on Florisil cartridges, together with a calib ration using spiked extracts, are recommended. (C) 2001 Elsevier Science B. V. All rights reserved.