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金属锌是制备核纯金属钍的助熔材料。如果锌中含有稀土杂质,必会影响核纯金属钍的产品性能,因此有必要建立金属锌中稀土杂质的分析方法。为测定金属锌中痕量稀土元素,首先要将大量锌和稀土离分。本方法采用磺酸型阳离子树脂离子交换分离。淋洗介质选用2.4N 盐酸:丙酮=3:1混合液。该混合液比单纯 HCl 溶液分离效果要好,它能使稀土元素在阳离子交换树脂中分配系数增大,牢固地吸附在树脂
Metallic zinc is a flux material for the preparation of pure nuclear thorium. If the zinc contains rare earth impurities, it will affect the performance of the nuclear pure thorium products, it is necessary to establish a method for the analysis of rare earth impurities in zinc metal. For the determination of trace amounts of rare earth elements in zinc metal, first of all, a large number of zinc and rare earth separation. This method uses sulfonic acid cation exchange resin ion exchange. Rinse media selection of 2.4N hydrochloric acid: acetone = 3: 1 mixture. The mixed solution is better than pure HCl solution, which can increase the distribution coefficient of rare earth elements in the cation exchange resin, and firmly adsorb the rare earth element in the resin