チオテノイルトリフルオロアセトンによる亜鉛(II)とカドミウム(II)の協同抽出分離

概要

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The selectivity in the synergistic extraction of cadmium(II) and zinc(II) with a mixture of thiothenoyltrifluoroacetone (STTA) and a pyridine base was surveyed. The degree of synergistic effect of a pyridine base in the extraction of cadmium(II) was more remarkable than in the case of zinc(II). As a result, preferential extraction of cadmium(II) could be performed. In order to attain the complete separation of cadmium(II) from zinc(II), we employed 2,2'-dipyridyl(dipy), which might act as an additive in cadmium (II) extraction due to possible formation of an adduct Gd(STTA)_2(dipy) and at the same time, this reagent is expected to work as a masking agent for zinc(II). The procedure for the separation is as follows : Twenty ml of an aqueous solution containing 0.1M sodium chloride (pH=3.6) is equilibrated with an equal volume of 1×10^<-3>M STTA and 0.1M 2.2'-dipyridyl in 1,2-dichloroethane by shaking the mixture for 10min. Only cadmium(II) is selectively extracted into the organic phase.
社団法人日本分析化学会の論文
1978-07-05