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我们研究了苯并15—冠—5三氯甲烷溶液从苦味酸阴离子的水溶液中对某些镧系元素(Sm、Eu、Gd)的萃取行为。考察了冠醚、苦味酸阴离子以及金属离子的浓度变化对三个镧系元素分配比的影响。在本实验条件下由斜率法分析得出:Sm(Ⅲ)和Gd(Ⅲ)的萃合物组成为1:1:1(金属离子/冠醚/苦味酸阴离子);Eu(Ⅲ)的萃合物组成为1:1:3。
We studied the extraction behavior of certain lanthanides (Sm, Eu, Gd) from benzoic 15-crown-5 trichloromethane solution from an aqueous picric acid solution. The effects of crown ether, picric acid anion and metal ion concentration on the distribution ratio of three lanthanides were investigated. The results of slope analysis showed that the composition of Sm (Ⅲ) and Gd (Ⅲ) was 1: 1: 1 (metal ion / crown ether / picric acid anion) The composition of the compound is 1: 1: 3.