TITLE

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

AUTHOR(S)
Matsumiya, H.; Hiraide, M.; Iki, N.; Miyano, S.
PUB. DATE
July 2004
SOURCE
Analytical & Bioanalytical Chemistry;Jul2004, Vol. 379 Issue 5/6, p867
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
14387477

 

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