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Detection and quantification of chlordecone in contaminated soils from the French West Indies by GC-MS using the super(13)C sub(10)-chlordecone stable isotope as a tracer
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Detection and quantification of chlordecone in contaminated soils from the French West Indies by GC-MS using the super(13)C sub(10)-chlordecone stable isotope as a tracer
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Detection and quantification of chlordecone in contaminated soils from the French West Indies by GC-MS using the super(13)C sub(10)-chlordecone stable isotope as a tracer
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Journal Article
Detection and quantification of chlordecone in contaminated soils from the French West Indies by GC-MS using the super(13)C sub(10)-chlordecone stable isotope as a tracer
2014
Overview
Chlordecone is an organochlorine insecticide that has been widely used to control banana weevil in the French West Indies. As a result of this intense use, up to 20,000 ha are contaminated by this insecticide in the French West Indies, and this causes environmental damage and health problems. A scenario of exposure was drawn by French authorities, based on land usage records. Many efforts have been made to monitor the occurrence of chlordecone and its main metabolites using different analytical methods, including GC, GC/MS, LC/MS, and NIRS. Although these different methods allow for the detection and quantification of chlordecone from soils, none of them estimate the bottleneck caused by extraction of this organochlorine from soils with high adsorption ability. In this study, we used super(13)C sub(10)-chlordecone as a tracer to estimate chlordecone extraction yield and to quantify chlordecone in soil extracts based on the super(13)C/ super(12)C isotope dilution. We report the optimization of super(13)C sub(10)-chlordecone extraction from an Andosol. The method was found to be linear from 0.118 to 43 mg kg super(-1) in the Andosol, with an instrumental detection limit estimated at 8.84 mu g kg super(-1) . This method showed that chlordecone ranged from 35.4 down to 0.18 mg kg super(-1) in Andosol, Nitisol, Ferralsol, and Fluvisol soil types. Traces of the metabolite beta -monohydrochlordecone were detected in the Andosol, Nitisol, and Ferralsol soil samples. This last result indicates that this method could be useful to monitor the fate of chlordecone in soils of the French West Indies.
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