Separation of ¹¹¹In From Cyclotron Irradiated Cd Target with Extraction Chromatographic Method

¹¹¹In was produced by the nuclear reaction of ^natCd(p,xn)¹¹¹In. In order to separate ¹¹¹In from Cyclotron irradiated natural Cd target，a radiochemical purification procedure of CL-D₂EHPA extraction chromatography method was developed. Based on the distribution coefficients (K_d) of In³⁺, Fe³⁺, Cu²⁺, Zn²⁺ and Cd²⁺ between Di-(2-ethylhexyl) phosphate resin and hydrochloric acid or nitric acid medium, the separation of ¹¹¹In from natural Cd and other nuclides using CL-D₂EHPA resin column and different concentrations of HNO₃ and HCl as the eluants had been studied. The Cd、Cu、Zn fractions were eluted by 7 mol/L HNO₃, ¹¹¹In fraction was washed out and collected in 3 mol/L HCl. The recovery yield of ¹¹¹In³⁺ was over 96%. The radionuclidic purity of ¹¹¹In produced by natural Cd was more than 96%, The total chemical impurity was less than 2 mg/L.