ANION EXCHANGE BEHAVIOURS OF THORIUM, CERIUM,EUROPIUM, YTTRIUM AND SCANDIUM IN ETHANOL-HYDROCHLORIC ACID MIXED SOLVENT乙醇-盐酸混合溶剂中钍、铈、铕、钇、钪的阴离子交换行为
ANION EXCHANGE SEPARATION OF SCANDIUM FROM YTTRIUM, CERIUM AND THORIUM IN NITRIC ACID-METHANOL MEDIUM硝酸—甲醇介质中钪与钇、铈、钍的阴离子交换分离