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

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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.

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Authors and Affiliations

  1. Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan

    Hiroaki Matsumiya & Masataka Hiraide

  2. Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Aoba-ku, Sendai 980-8579, Japan

    Nobuhiko Iki & Sotaro Miyano

Authors
  1. Hiroaki Matsumiya
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  2. Nobuhiko Iki
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  3. Sotaro Miyano
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  4. Masataka Hiraide
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Correspondence to Hiroaki Matsumiya.

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Matsumiya, H., Iki, N., Miyano, S. et al. Preconcentration of copper, cadmium, and lead with a thiacalix[4]arenetetrasulfonate-loaded Sephadex A-25 anion-exchanger for graphite-furnace atomic-absorption spectrometry. Anal Bioanal Chem 379, 867–871 (2004). https://doi.org/10.1007/s00216-004-2655-5

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  • DOI: https://doi.org/10.1007/s00216-004-2655-5

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