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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 extraction of Sr ~ (2+) and Y ~ (3 +) was studied with a novel extractant, diphenyl-16-crown-5-oxoacetate. The results show that Y ~ (3+) can be extracted quantitatively under the proper pH condition, while almost all of Sr ~ (2+) remains in the aqueous phase. The slope ratio method was used to determine the composition ratio of 1, 2-diphenyl-16-crown-5-oxoacetic acid to Y ~ (3+) complex. A method of extracting unsupported high purity radioactive (90) Y from ~ (90) Sr was established.