Microchimica Acta

, Volume 136, Issue 3–4, pp 137–141 | Cite as

A Simple Method for the Speciation of Organotin Compounds in Water Samples Using Ethylation and GC-QFAAS

  • Nikolaos S. Thomaidis
  • Freddy C. Adams
  • Themistokles D. Lekkas

Abstract.

 A simple method for the extraction of organotin compounds from water samples was developed in which both the instrumental parameters and the extraction/derivatization step were optimized. Organotin compounds (butyl-, phenyl- and octyl-) in tap water samples were ethylated with the addition of 2.5 ml of 0.4% w/v NaBEt4 at pH 5.00 and subsequently extracted two times, for 10 min, with 3 and 2 ml of hexane. The combined extracts were analyzed with on-column capillary GC-QFAAS. The recoveries were quantitative for di- and tri- alkyltin compounds, whereas between 67 and 86% of the monoalkyltin compounds were recovered. The detection limits obtained ranged from 110 pg for monobutyltin to 500 pg for triphenyltin, as sensitivities were found to be compound dependent. The preparation of ethylated standards was also optimized. It was found that two subsequent extractions, with 1.0 and 0.5 ml of hexane were necessary for the quantitative recovery of the ethylated organotin compounds.

Key words. Organotin compounds; ethylation; water samples; gas chromatography quartz furnace atomic absorption spectrometry. 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Wien 2001

Authors and Affiliations

  • Nikolaos S. Thomaidis
    • 1
  • Freddy C. Adams
    • 1
  • Themistokles D. Lekkas
    • 2
  1. 1. MiTAC, Department of Chemistry, Universitaire Instelling Antwerpen, Universiteitsplein 1, B-2610 Antwerp, BelgiumBE
  2. 2. Laboratory of Water and Air Quality, Department of Environmental Studies, University of the Aegean, Theofrastou and Alkaiou, GR-81 100 Mytilene, GreeceGR

Personalised recommendations