Preconcentration of copper, cadmium, and lead with a thiacalix[4] arenetetrasulfonate-loaded Sephadex A-25 anion-exchanger for graphite-furnace atomic-absorption spectrometry

Hiroaki Matsumiya, Nobuhiko Iki, Sotaro Miyano, Masataka Hiraide

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A rapid column-adsorption method has been developed for concentrating traces of copper, cadmium, and lead in water prior to their determinations by graphite-furnace atomic-absorption spectrometry. The adsorbent used was prepared by loading a strongly basic anion-exchanger QAE-Sephadex A-25 (50 mg) with thiacalix[4]arenetetrasulfonate (20 μmol). Two-hundredfold preconcentration of the analyte elements was achieved by passing 100 mL of sample solution (pH 8.0) through a column packed with the adsorbent (6 mm i.d.×7 mm high) at a flow rate of 10 mL min-1 and by the subsequent elution with 500 μL of aqueous nitric acid solution (1 mol L-1). The practical applicability of the proposed method was evaluated by analyzing certified reference seawater samples.

Original languageEnglish
Pages (from-to)867-871
Number of pages5
JournalAnalytical and Bioanalytical Chemistry
Volume379
Issue number5-6
DOIs
Publication statusPublished - 2004 Jul 1

Keywords

  • Atomic-absorption spectrometry
  • Calixarene
  • Chelating adsorbent
  • Heavy metals
  • Preconcentration
  • Seawater

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry

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