用均二苯基－16－冠－5－氧代乙酸从^（90）Sr－^（90）Y中萃取~（90

A STUDY OF SOLVENT EXTRACTION OF FROM WITH SYM-DIBENZO-16-CROWN-5-OXYACETICACID

用新型萃取剂均二苯基－１６－冠－５－氧代乙酸研究了Ｓｒ￣（２＋）和Ｙ￣（３＋）的萃取。结果表明，在适当ｐＨ条件下，Ｙ￣（３＋）可以定量地被萃取，而Ｓｒ￣（２＋）几乎全部留在水相中。利用斜率法确定了均二苯基－１６－冠－５－氧代乙酸与Ｙ￣（３＋）的配合物组成比为１：２。建立了从￣（９０）Ｓｒ中萃取无载体高纯放射性￣（９０）Ｙ的方法。

The Solvent extraction of and is studied with a new type extractant sym-dibenzo-16- crown- 5-oxyacetic acid (HL) in chloroform. is quantitatively extracted at pH6.5,whereasthe extraction of Sr￣(2+)is negligible. Separation of from can be achieved by solvent extrac-tion with HL. The mechanism of extraction of Y￣(3+) is discussed.