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Direct laser photo-induced fluorescence determination of bisphenol A

Abstract : Classical photo-induced fluorescence methods are conducted in two steps: a UV irradiation step in order to form a photo-induced compound followed by its fluorimetric determination. Automated flow injection methods are frequently used for these analyses. In this work, we propose a new method of direct laser photo-induced fluorescence analysis. This new method is based on direct irradiation of the analyte in a fluorimetric cell in order to form a photo-induced fluorescent compound and its direct fluorimetric detection during a short irradiation time. Irradiation is performed with a tuneable Nd:YAG laser to select the optimal excitation wavelength and to improve the specificity. It has been applied to the determination of bisphenol A, an endocrine disrupter compound that may be a potential contaminant for food. Irradiation of bisphenol A at 230 nm produces a photo-induced compound with a much higher fluorescence quantum yield and specific excitation/emission wavelengths. In tap water, the fluorescence of bisphenol A increases linearly versus its concentration and, its determination by direct laser photo-induced fluorescence permits to obtain a low limit of detection of 17 μg L(-1)
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Submitted on : Wednesday, July 12, 2017 - 12:27:26 PM
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Alicia Maroto, Prosnick Kissingou, Alexandre Diascorn, Badr Benmansour, Laure Burel-Deschamps, et al.. Direct laser photo-induced fluorescence determination of bisphenol A. Analytical and Bioanalytical Chemistry, 2011, 401 (9), pp.3011 - 3017. ⟨10.1007/s00216-011-5375-7⟩. ⟨hal-01561074⟩



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