镧的离子交换分离和测定

Seperation and Determination of Ionic Exchange in Lanthanum

研究了混合稀土中镧与其它稀土元素在强酸性阳离子交换树脂上的分离特性。根据镧与其它稀土和磺基水杨酸络合物稳定常数的差异，而使镧与其它十四种稀土元素分离，用所拟分离和测定的方法进行标准回收、人工合成试样、混合稀土氧化物及独居石行样的分析结果表明，此法精密度及准确度均尾良好。

The seperation features are studied about lanthanum and other rare-earth elements onexchanging resin of strong acidic cation. Accord ing to the d ifference of the stable constants oflanthanum and other rare earths and sulfosalicylic acid, lanthanum is separated from the other fourteenrare-earth elements. The analytic result from the standard recovery rate , synthetical samples , mixedrare oxides and soandard samples of monazite by means of separation and determination has shown thegood precision and accuracy of this method.