二,三の金属イオンと共存するカドミウムの光度滴定
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概要
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After photometric titration at 562mμ of a sample solution containing cadmium and several other metals with 0.01<I>M</I> or 0.001<I>M</I> EDTA at pH about 5.0 with Xylenol Orange as an indicator, the solution was treated with potassium iodide to liberate EDTA equivalent with cadmium which was then back-titrated photometrically with a standard zinc solution. The method was simple and rapid. Mercury (II) and copper were masked with thiourea. More than 10μg of iron (III) interfered but larger amounts of sodium, magnesium, silver, lead, cobalt and zinc did not.<BR>As little as 6μg of cadmium in the mixture of the above metal ions could be determined.
- 社団法人 日本分析化学会の論文