Solid-phase extraction of Zn(II), Cu(II), Ni(II) and Pb(II) on poly(vinyl chloride) modified with 3-ferrocenyl-3-hydroxydithioacrylic acid, and their subsequent determination by electrothermal atomic absorption spectrometry

Jackson K. Kiptoo, J. Catherine Ngila, Ned D. Silavwe

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

A new chelating resin based on poly(vinyl chloride) functionalized with 3-ferrocenyl-3-hydroxydithioacrylic acid has been synthesized and characterized. The resin was used as a packing material in an off-line mini-column solid-phase extraction system for preconcentration of Zn, Ni, Cu and Pb in water samples prior to their determination using electrothermal atomic absorption spectrometry. Analytical parameters such as pH, flow rate and sample breakthrough volume were optimized. The breakthrough volume for 0.2 μg of analyte using 0.1 g of adsorbent was 60-100 mL, permitting enrichment factors of at least 60. The proposed procedure, validated using a riverine water reference material (SLRS-3), was applied to environmental water samples. The potential for use of the chelating resin to separate interfering ions such as Na, K, Mg and Ca is also explored.

Original languageEnglish
Pages (from-to)211-218
Number of pages8
JournalMikrochimica Acta
Volume160
Issue number1-2
DOIs
Publication statusPublished - Jan 2008
Externally publishedYes

Keywords

  • 3-ferrocenyl-3-hydroxydithioacrylic acid
  • ETAAS
  • Poly(vinyl chloride)
  • Trace metal enrichment

ASJC Scopus subject areas

  • Analytical Chemistry

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