采用阴离子(国产717型)交换树脂在甲醇-硝酸存在下进行铈组,钇组稀土元素的分离,其效果远较经典法优越。为了能更快地达到分离目的,我们对洗脱液的组成比例等离子交换分离条件进行了改进试验。结果表明:以70％甲醇-30％3.4M硝酸为交换介质和洗脱液,100毫升便可将1毫克以下的钇组稀土或钇定量洗脱而与铈组稀土(镧、铈、镨、钕)分离。稀土与钍的分离,我们的试验表 The use of anion (domestic 717 type) exchange resin in the presence of methanol - nitric acid cerium group, yttrium group of rare earth elements, the effect is far superior to the classical method. In order to achieve the separation purpose more quickly, we improved the plasma exchange separation conditions of the eluent composition ratio. The results showed that the rare earth or yttrium of 1 mg yttrium or less can elute with 100 ml of 70% methanol-30% 3.4M nitric acid as the exchange medium and eluant, and eluted with rare earth (lanthanum, cerium, praseodymium, Neodymium) separation. Rare earth and thorium separation, our test table