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使用NH_4~+型Dawex-50离子交换树脂分离钍与铈的条件是:淋洗剂(Pb—EDTA)的浓度应为0.015M。溶液pH为3.O,流速控制在1.0—1.5毫升/分钟在此条件下使用200mlPB一EDTA淋洗剂,可将钍离子完全冼脱即便使用1000ml淋洗剂亦不致将铈离子洗脱,这样便可将钍与铈完全分离,然后以水洗滌交换柱,并以3N HCI再将铈离子洗脱。
The conditions for the separation of thorium and cerium using an NH 4 + type Dawex-50 ion exchange resin are: The concentration of the eluent (Pb-EDTA) should be 0.015M. Solution pH of 3. O, flow rate control in the 1.0-1.5 ml / min Under this condition using 200mlPB a EDTA rinse agent, thorium ions can be completely Xianlian even use 1000ml elution of cerium ions will not elution, so Thorium can be completely separated from the cerium, then the column is washed with water, and the cerium ions are eluted with 3N HCI.