Radiochemical separation of high purity 111In from cadmium, copper, aluminium and traces of iron: Use of a cation exchange resin with hydrobromic acid and hydrochloric acid

111In was obtained by a two-step separation procedure from an irradiated cadmium target, extending the method developed earlier by the authors for silver targets. The overall yield was 90–95% and the purity of the 111In was compatible with medical applications.