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Analysis of pesticide residues in wine by solid-phase extraction and gas chromatography with electron capture and
J J Jiménez1, J L Bernal, M J del Nozal
1Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Spain.
Abstract:
A feasible and reproducible method for multiresidue analysis of several common pesticides, of different polarities, in wine samples is proposed. The method combines a solid-phase extraction on polymeric cartridges eluted with ethyl acetate and a gas chromatographic determination using electron capture and nitrogen-phosphorus detection. To avoid the matrix effect, previous washing of the cartridges with a mixture of water-2-propanol (90:10) and further clean-up of the extract on Florisil cartridges, together with a calibration using spiked extracts, are recommended.
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