Simultaneous Production of 111In and 109Cd by Alpha Particle Irradiation of natAg Target and Synergistic Aqueous Biphasic Separation using Green Tea Polyphenols

(111I)n and Cd-109 radionuclides were produced by 31 MeV alpha --particle irradiation of Ag-nat target. To separate no-carrier added (NCA) In-111 and Cd-109 from bulk Ag, Aqueous Biphasic System (ABS) was constructed using twelve salts and two polyethylene glycol (PEG) combinations. Out of all these combinations, only three salts e. g., Na2SO3, Na- malonate and Na-Tartrate and PEG combinations showed significant separation between bulk Ag and NCA radioisotopes. Addition of catechins extracted from green tea to the above ABS systems increased the separation factors many folds. Highest separation factor (S-In/Ag=5.6x10(4)) for In-111 was obtained in Na2SO3-PEG 4000 and 50 mg catechins system. Cd-109 retained in NCA state in the Na-malonate phase after the extraction of In-111 and bulk Ag in the catechin-PEG phase.