Abstract.
This paper presents the development of two optosensors for the determination of four polycyclic aromatic hydrocarbons (anthracene, benzo[a]pyrene, fluoranthene and benzo[b]fluoranthene) using a photomultiplier device and an intensified coupled charge device (ICCD) as optical transducers, respectively. These optosensors are based on the on-line immobilization of the analytes onto a non-ionic resin solid support (Amberlite XAD-4) in a continuous flow system, followed by the measurement of their native fluorescence. The determinations were performed using 15 mM H2PO4 -/HPO4 2- buffer solution at pH 7 and 25% 1,4-dioxane. Detection limits were 6.4 and 9.3 for ANT, 3.3 and 2.5 for BbF, 1.4 and 13.2 for FLT, and 1.7 and 7.8 for BaP using optosensor 1 or 2, respectively. Relative standard deviations were 7.9 and 6.7 for ANT at 50 ng mL-1, 3.5 and 7.4 for BbF at 60 ng mL-1, 3.6 and 8.9 for FLT at 50 ng mL-1, and 6.7 and 11.6 for BaP at 50 ng mL-1 using optosensor 1 or 2, respectively. Finally, a critical comparison between the two configurations based on different transducers (photomultiplier and ICCD) for resolving and simultaneously determining mixtures of the polycyclic aromatic hydrocarbons under study in water samples (tap and mineral waters) were carried out.
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Acknowledgements.
The authors gratefully acknowledge the financial support from the Spanish Ministerio de Ciencia y Tecnología (Project PPQ2000–1291-C02) and from "Plan Nacional de I+D+I de Asturias" (FICYT) (Project Ref. PC-CIS01–13) and a grant from the Consejería de Medio Ambiente de la Junta de Andalucía (Agreement no. 1870).
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Fernández-Sánchez, J.F., Segura-Carretero, A., Costa-Fernández, J.M. et al. Fluorescence optosensors based on different transducers for the determination of polycyclic aromatic hydrocarbons in water. Anal Bioanal Chem 377, 614–623 (2003). https://doi.org/10.1007/s00216-003-2092-x
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DOI: https://doi.org/10.1007/s00216-003-2092-x