Preparation of an Indium-113m Generator

Abstract

A ^113mIn generator by the column of SnS₂ precipitated on the anion exchange resin was prepared. This utilizes the isotopic exchange reaction between SnS₂ and ¹¹³Sn solution. The long-lived parent ¹¹³Sn was loaded on the column and the short-lived daughter ^113mIn was eluted out with 0.1-0.01M HCI. In each milking sequence, the leakage of ¹¹³Sn was found to be always of the order from 10^-3 to 10^-4 per cent of the original activity during the passage of 1l of the effluent through the column. The yield is about 20 per cent of the ^113mIn on the column. The radiochemical impurities, ⁶⁰Co and ^114mIn present in ¹¹³Sn sample, are removed by this method.