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测定稀土矿物中的稀土总量,常需先用沉淀法使稀土与其他元素分离。但是反复沉淀容易引起组分的损失而且费时。离子交换法在含稀土矿物的分离方面已有应用,但氟碳铈镧矿因伴生有铁、锰、钙、锶、钡、硅、磷、氟等元素,使用盐酸作淋洗剂不能使稀土与钡分离。本文推荐双柱式离子交换方法,并选用适宜的淋洗剂,可使稀土、钙、锶及钡定量分离,从而同时获得稀土总量、钙、锶及钡的分析结果。本法的装置简单,淋洗试剂的用量小而且流速较高,试样分解之后,分离和测定过程可在八小时内完成。
Determination of rare earth minerals in the total rare earth, often need to use precipitation method to separate the rare earth and other elements. However, repeated precipitation easily causes loss of components and takes time. Ion exchange method has been used in the separation of rare earth-containing minerals, but the bastnaesite due to associated with iron, manganese, calcium, strontium, barium, silicon, phosphorus, fluorine and other elements, the use of hydrochloric acid as a rinsing agent can not make rare earth Separated from barium. In this paper, a double-column ion exchange method is recommended, and the appropriate eluent is used to quantitatively separate rare earth, calcium, strontium and barium so as to simultaneously obtain the results of the analysis of the total amount of rare earth, calcium, strontium and barium. The method of the present invention is simple, the amount of elution reagent is small and the flow rate is high. After the sample is decomposed, the separation and determination process can be completed within eight hours.