Multiresidue analysis of atrazine, diuron and their degradation products in sewage sludge by liquid chromatography tandem mass spectrometry |
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Authors: | Aline Ghanem Philippe Bados François Perreau Rachid Benabdallah Cécile Plagellat Luiz Felippe de Alencastro Jacques Einhorn |
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Institution: | (1) INRA, UR258 Phytopharmacie et Médiateurs Chimiques, Route de Saint-Cyr, 78026 Versailles Cedex, France;(2) INRA, UR251 Physicochimie et Ecotoxicologie des Sols d’Agrosystèmes Contaminés, Route de Saint-Cyr, 78026 Versailles Cedex, France;(3) Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des Sciences et Technologies de l’Environnement (ENAC ISTE GE), 1015 Lausanne, Switzerland |
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Abstract: | A multiresidue method has been developed to analyze atrazine (ATZ), diuron (DIU), and their major degradation products, desethylatrazine
(DEA), desisopropylatrazine (DIA), and dichlorophenylmethylurea in sewage sludge. Liquid chromatography coupled to electrospray
tandem mass spectrometry (LC–ESI-MS–MS) allowed, in the multiple-reaction monitoring mode, the simultaneous analysis of these
pesticides in only one run after their extraction with ethyl acetate–dichloromethane 90:10 (v/v) and a cleanup on a Florisil column. Stable isotopically labeled ATZ and DIU were used as internal standards to overcome
matrix effects during the pesticide quantification. Using fortified samples, the method gave rise to 86–115% as mean recovery
values depending on the analyte. Limits of detection (LODs) and of quantification (LOQs) ranging from 0.3 (DIA) to 1.5 (DEA)
μg kg−1 dw and from 0.4 (DIA) to 2.0 (DEA) μg kg−1 dw, respectively, were sufficient to achieve the monitoring of these molecules in sludge from wastewater treatment plants
of the Ile-de-France region. |
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Keywords: | Triazine Phenylurea Herbicide Liquid chromatography tandem mass spectrometry Sewage sludge |
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