利用112Cd(p,2n)111In反应制备111In(T1/2=283d)时,为减少放射性杂质109In、110Inm和114Inm的产生,制备采用富集度为97.28%的112Cd靶生产用以111In。在分离111In后的溶液中,主要含有Cu和Cd。采用717#阴离子交换树脂分离纯化回收富集Cd。实验结果表明:Cd的回收率大于99%。富集镉 111In (T1 / 2 = 283d) was prepared by 112Cd (p, 2n) 111In reaction. In order to reduce the generation of 109In, 110Inm and 114Inm of radioactive impurities, 112In target enrichment of 97.28% The solution after 111In separation mainly contains Cu and Cd. Separation and purification of 717 # anion exchange resin was used to recover and enrich Cd. The experimental results show that the recoveries of Cd are more than 99%. Enrichment of cadmium