Fipronil is an insecticide now forbidden in France for agricultural use, but still widely used in urban areas for flea and termit treatments. This leads to Bordeaux's wastewater treatment plant (WWTPs) influent contamination. As fipronil and its metabolites are not removed by WWTPs, they are present in effluents at non negligible concentrations (from 1 to 40 ng/L) and are released into Garonne River. As effluents are quite diluted when diluted in the Garonne River, expected levels of concentration of fipronil are very low. However, fipronil is suspected to be very toxic for aquatic organisms: predicted no effect concentration (PNEC) is determined at 0.77 ng/L. The aim of this study was to provide an optimized monitoring methodology of fipronil and its metabolites at different sites of the Garonne River by using an innovative and sensitive way of extraction: stir bar sorptive extraction (SBSE).

High and sensitive monitoring of fipronil and its metabolites in the Garonne River, France

248th National Meeting (2014)

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