Sun light degradation of 4-chloroaniline in waters and its effect on toxicity. A high performance liquid chromatography - Diode array - Tandem mass spectrometry study |
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Authors: | Fabio Gosetti Michela Bottaro Valentina Gianotti Eleonora Mazzucco Paolo Frascarolo Davide Zampieri Caterina Oliveri Aldo Viarengo Maria Carla Gennaro |
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Affiliation: | University of Piemonte Orientale, DISAV Dipartimento di Scienze dell'Ambiente e della Vita, viale T. Michel 11, 15121 Alessandria, Italy |
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Abstract: | This paper studies the degradation reactions that 4-chloroaniline can naturally undergo in waters for the action of sun light. 10.00 mg L−1 4-chloroaniline aqueous solution, without any addition of organic solvent, are undergone to photoirradiation under conditions that simulate sun light. The degradation pathway, followed by HPLC-DAD-MS/MS methods, is complex since the pollutant gives rise to many photoproducts: the predominant species are characterized by m/z values of 217 (P5) and 218 (P6) and are compatible with dimeric structures of 4-chloroaniline. Vibrio fischeri tests indicate that the photoproducts of 4-chloroaniline are characterized by a toxicity level significantly greater than the precursor. |
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Keywords: | 4-chloroaniline HPLC-MS APCI Sun light degradation Organic pollutants |
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