Determination of pentachlorophenol residues in wine and corks by solvent extraction methodology and specific gas chromatography detection |
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Authors: | J F Cooper J Tourte P Gros |
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Institution: | (1) Laboratoire Interrégional, Direction Générale de la Concurrence, de la Consommation et de la Repression des Fraudes, 205, Avenue de la Croix Verte, 34196 Montpellier Cedex 5, France |
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Abstract: | Summary A gas chromatographic methodology with selective detection is presented for the analysis in wines and corks of pentachlorophenol residues, which are suspected to be the most likely precursors of some off-flavours described in several wine samples. After derivatisation, pentachlorophenol acetate residues were monitored by electrolytic conductivity detection and/or mass spectrometric detection in the selective ion mode at m/z 264 and 266. Recoveries varied from 80 to 96% for wine samples fortified with 5 to 100 g l–1 and from 83 to 91% for corks (fortified at 25 to 100 g kg–1). The proposed methodology allowed for a determination limit of g l–1 for wine and 10 g kg–1 for corks. |
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Keywords: | Gas chromatography Pentachlorophenol residues Off-flavours Wines and corks Electrolytic conductivity detector/mass spectrometry detectors |
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