Separation Of Radioisotope 113mIn Using Column Chromatography Based on Silica Gel Matrix

Radioisotope indium-113m ( 113m In) with half-life, T 1/2 = 1.7 hours and gamma energy, Eg = 391 keV is suitable and meets the criteria as radiotracer in industry. 113m In radioisotope was obtained from tin-113 decay ( 113 Sn, T 1 / 2 = 115 days) of 112 Sn (n,g) 113 Sn neutron activation in nuclear reactor. The process of separation of radioisotope 113m In using column chromatography method based on silica gel matrix using 0.05 M HCI solution. Radionuclide and radiochemical purity tests were performed using the gamma-spectrometry method and paper chromatography. The final product specification in the form of 113m InCl 3 is clear solution, pH 2, obtained yield of 81.83%, radionuclide purity of 90.22%, radiochemical purity of 91.61 ± 0,29% and stable for 3 days at room temperature.