一、引言电磁法分离的浓缩钡同位素是收集在铜接收器中,当用稀硝酸溶解接收器中钡同位素时,有大量的铜也被溶解下来,这些铜用恒电流电解法很容易除去。但要得到高纯的钡同位素就必须与一些常见杂质元素如铁、镍、锶及铅进行分离。钡与常见杂质元素的分离方法很多,例如有铬酸钡沉淀法,阳离子交换分离法, I. INTRODUCTION The concentrated barium isotopes separated by electromagnetism are collected in copper receivers. When dilute nitric acid is used to dissolve the barium isotopes in the receiver, a large amount of copper is also dissolved. The copper is easily removed by galvanostatic electrolysis. But to get high-purity barium isotopes must be separated with some common impurity elements such as iron, nickel, strontium and lead. Barium and common impurity element separation methods are many, for example, barium chromate precipitation, cation exchange separation,