Abstract
In this work, a simple and efficient method for producing high radionuclidic purity 111In from an enriched 112Cd target was developed. The enriched 112Cd metal target formed by cyanide-free electroplating was bombarded with protons of 21 MeV in a CS-30 cyclotron. Then, we explored a purification scheme using CL-P204 cation exchange resin wherein 98% of the 111In in the bombarded target could be extracted in less than 1 h. The purified 111In in the form of [111In]In-chloride had a high radionuclidic purity (99.9%) and a low impurity concentration (<1.2 ppm). The yield of 111In via the reaction of 112Cd (p, 2n) 111In was measured to be 222 ± 5 MBq/μA∙h. In addition, a chemical procedure for collecting the unreacted 112Cd at a recovery rate of 96.6% was explored.
Published Version
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