Application of the effects of solvent and dissolved oxygen on the determination of benzo[a]pyrene by constant-wavelength synchronous spectrofluorimetry in smoke-flavouring |
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Authors: | Falcón M S Amigo S G Yusty M A Lage B L Lozano J S |
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Institution: | Department of Analytical Chemistry, Nutrition and Bromatology, Area of Nutrition and Bromatology, Faculty of Pharmacy, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain. |
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Abstract: | This work studies the effects of solvent and of dissolved oxygen in the determination of benzoa]pyrene (BaP) by constant-wavelength synchronous spectrofluorimetry in smoke-flavour agents, as confirmation and quantification techniques. The wavelength of the most intense peak at the optimum excitation-emission wavelength interval (20 or 110 nm in most of nine solvents) varied by up to 5 nm, and the detection and quantification limits by a factor of up to 30. The best quantification limit was obtained with DMSO (0.09 mug l(-1)). The deoxygenation of the analyte solution decreased detection and quantification limits, by a variable factor (8-1.13 in the case of n-hexane and DMSO, respectively). |
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