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Preconcentration and fluorimetric determination of polycyclic aromatic hydrocarbons based on the acid-induced cloud-point extraction with sodium dodecylsulfate

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Abstract

The acid-induced cloud-point extraction (CPE) technique based on sodium dodecylsulfate (SDS) micelles has been used for preconcentration of ten representatives of polycyclic aromatic hydrocarbons (PAHs) for the following fluorescence determination. The effect of the acidity of solution, SDS and electrolyte concentrations, centrifugation time and rate on the two-phase separation process and extraction percentages of PAHs have systematically been examined. Extraction percentages have been obtained for all PAHs after CPE ranged from 67 to 93%. Pyrene was used as a fluorescent probe to monitor the micropolarity of the surfactant-rich phase compared with SDS micelles and this allows one to conclude that water content in micellar phase after CPE is reduced. The spectral, metrological and analytical characteristics of PAH fluorimetric determination after acid-based CPE with sodium dodecylsulfate are presented. Advantages provided by using CPE in combination with fluorimetric determination of PAHs are discussed. The determination of benz[a]pyrene in tap water is presented as an example.

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Acknowledgements

The work was supported by Russian Ministry of Education (Federal Education Agency), projects 45432 and 45166.

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Authors and Affiliations

  1. Chemistry Department, Saratov State University, 410012, Saratov, Russia

    Irina Yu. Goryacheva, Sergei N. Shtykov, Alexander S. Loginov & Irina V. Panteleeva

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  1. Irina Yu. Goryacheva
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  2. Sergei N. Shtykov
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  3. Alexander S. Loginov
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  4. Irina V. Panteleeva
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Correspondence to Irina Yu. Goryacheva.

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Goryacheva, I.Y., Shtykov, S.N., Loginov, A.S. et al. Preconcentration and fluorimetric determination of polycyclic aromatic hydrocarbons based on the acid-induced cloud-point extraction with sodium dodecylsulfate. Anal Bioanal Chem 382, 1413–1418 (2005). https://doi.org/10.1007/s00216-005-3287-0

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  • DOI: https://doi.org/10.1007/s00216-005-3287-0

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