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Various methods have been developed for the extraction of a promising medical radionuclide 117mSn from proton-irradiated TiSb intermetallic compound, a target material suitable for irradiation with an intense beam of accelerated protons. To separate radiotin from Ti, Sb, and radionuclides of other elements, methods of ion-exchange chromatography and liquid extraction were used, in particular, the anion-exchange separation of tin and titanium in the form of a peroxide complex in HCl solution, extraction of tin with benzene from iodide solutions, and chromatographic purification on silica gel from citrate solutions. As a result, 117mSn of high purity, which meets the requirements for nuclear medicine, was obtained. [ABSTRACT FROM AUTHOR]

A method of isolation of actinium-225 for nuclear medical applications from thorium targets irradiated by protons is presented. It comprises liquid extraction and extraction chromatography separations. The method demonstrates high (> 85%) chemical yield and radionuclide purity of the final product. An impurity of227Ac (0.1% at the end of bombardment) does not hinder225Ac from being used for medical225Ac/213Bi generators. [ABSTRACT FROM AUTHOR]