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A comparative study of trace enrichment of chlorophenols in water by extraction with C6 and C8 alkanes and by C18 reversed-phase adsorption

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Abstract

The efficiency, reproducibility and sensitivity ofn-hexane and iso-octane extraction and of C18 reversed-phase adsorption for accumulation of 4-chloro-, 2,4-dichloro-, 2,4,5- and 2,4,6-trichloro-, 2,3,4,6-tetrachloro- and pentachlorophenol from aqueous solutions were compared. In extraction procedures the acetyl and pentafluorobenzoyl derivatives of chlorophenols were extracted from water. In adsorption procedure chlorophenols adsorbed on a Sep-Pak C18 cartridge were eluted with acetone and after that derivatized analogously.

All three procedures were found to be applicable for an efficient trace enrichment of chlorophenols in water, the proper choice being dependent on the required sensitivity of the analysis. Lower detection limits of single compounds at ≈10 ng·1−1 levels were achieved by adsorption procedure owing to the more uniform and for most chlorophenols higher adsorption than extraction recoveries as well as owing to the possibility of treating larger volumes of water samples. The extraction procedure could be successfully applied to the concentrations of chlorophenols in water ≥1μg·1−1.

Owing to its higher efficiency and better sensitivity the C18 reversed-phase adsorption procedure was chosen as the more suitable one for the determination of chlorophenol levels in surface, ground and drinking waters. The conversion of chlorophenols accumulated from a water sample parallel to both acetyl and pentafluorobenzoyl derivatives and the analysis of both types of derivatives on two basically different gas Chromatographic columns were recommended for a more reliable identification and quantitation of the compounds analyzed.

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Authors and Affiliations

  1. Institute for Medical Research and Occupational Health, Moše Pijade 158, YU-41000, Zagreb, Yugoslavia

    Sanja Fingler, Vlasta Drevenkar & Želimira Vasilić

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  1. Sanja Fingler
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  2. Vlasta Drevenkar
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  3. Želimira Vasilić
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Fingler, S., Drevenkar, V. & Vasilić, Ž. A comparative study of trace enrichment of chlorophenols in water by extraction with C6 and C8 alkanes and by C18 reversed-phase adsorption. Mikrochim Acta 92, 163–175 (1987). https://doi.org/10.1007/BF01201836

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  • DOI: https://doi.org/10.1007/BF01201836

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