Polarographic trace analysis of cadmium(II) after solvent extraction using the salting-out method.

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概要

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• A selective and sensitive method is presented for the determination of cadmium(II), based on polarography after salting-out extraction into acetonitrile. The effect of nonaqueous solvents, salting-out agents, and the concentration of reagents has been studied. Under the conditions established, the cadmium(II) iodide complex extracted into the solvent gives a well-defined d.c. wave and a sharp a.c. peak, with <I>E</I><SUB>1⁄2</SUB> and <I>E</I><SUB>p</SUB>=−0.72 V <I>vs.</I> SCE respectively. Down to 0.50 ppm of cadmium(II) in the original aqueous solution can be determined by the proposed method. Lead(II) and In(III) do not interfere up to a 1000-fold amount relative to Cd(II). Interference from Fe(III) and Tl(III) can be eliminated by the addition of ascorbic acid.

• 公益社団法人 日本化学会の論文

著者

• NAGAOSA Yukio

  Faculty of Engineering, Fukui University

• Fujinaga Taitiro

  Faculty of Science, Kyoto University

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• Polarographic trace analysis of cadmium(II) after solvent extraction using the salting-out method.
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