Chromatographia

, Volume 71, Issue 11–12, pp 1049–1054 | Cite as

Determination of Hg(II) in Natural Waters by Diphenylation by Single-Drop Microextraction: GC

  • Ali Sarafraz Yazdi
  • Solmaz Banihashemi
  • Zarrin Es’haghi
Original

Abstract

The purpose of the present work is to develop a simple, rapid, sensitive and accurate method for the derivatization and subsequently preconcentration of Hg(II) and the determination of its derivative, diphenylmercury, in natural water samples using gas chromatography-flame ionization detection. The method is based on the diphenylation using phenyl boronic acid, subsequent extraction of phenylmercury into a single drop of an organic solvent (toluene), followed by gas chromatography-flame ionization detection GC-FID analysis of the extract. The pH of the feed solution was kept in pH 5 with acetate buffer solution. Thus, the optimized conditions are: organic solvent, toluene; derivatization time, 10 min; extraction time, 15 min; microdrop volume, 1.6 μL; stirring rate, 600 rpm; sample volume, 5 mL. The limit of detection (LOD), calculated on the basis of five replicates was 0.02 μg mL−1. The relative standard deviation of the method (RSD%, n = 5) was 3.0. Linear range was between 0.05 and 5 μg mL−1 and preconcentration factor obtained for phenyl-mercury was 105.

Keywords

Gas chromotography–flame ionization detection Single drop microextraction Phenylmercury 

Notes

Acknowledgments

The authors wish to thank the Ferdowsi University of Mashhad, Iran, for financial support of this work.

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Copyright information

© Vieweg+Teubner Verlag | Springer Fachmedien Wiesbaden GmbH 2010

Authors and Affiliations

  • Ali Sarafraz Yazdi
    • 1
    • 3
  • Solmaz Banihashemi
    • 1
  • Zarrin Es’haghi
    • 2
    • 3
  1. 1.Department of Chemistry, Faculty of SciencesFerdowsi University of MashhadMashhadIran
  2. 2.Department of Chemistry, Faculty of SciencesPayame Noor UniversityMashhadIran
  3. 3.Biotechnology Research CenterFerdowsi University of MashhadMashhadIran

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