对于轻、重稀土的分组测定,国内分析工作者进行了大量的工作,但大部采用阴离子交换,纸色层或溶剂萃取分离。S.B.Savvin 等曾研究了在轻、重稀土共存时偶氮硝羧与铈族元素的反应条件。武汉大学合成了该试剂,为开展此项工作创造了条件。本试验主要是在测定稀土总量的基础上,确定了一些偶氮硝羧测定铈族元素的主要条件,并拟定了矿石分析中测定铈族元素的流程。 For light and heavy rare earth grouping, domestic analysts carried out a lot of work, but most of the anion exchange, paper color layer or solvent extraction separation. S.B. Savav et al. Studied the reaction conditions of azo-nitro-carboxylates and cerium-based elements in the coexistence of light and heavy rare earths. Wuhan University synthesis of the reagent, to create the conditions for this work. Based on the determination of the total amount of rare earths, the main conditions for the determination of cerium elements by azo nitration of carboxyl groups were determined, and the procedure of determination of cerium elements in ore analysis was drawn up.