Development of Tc extraction-recovery by solvent extraction method

Kimura, Akihiro ; Nishikata, Kaori  ; Tanase, Masakazu*; Fujisaki, Saburo*; Izumo, Hironobu; Tsuchiya, Kunihiko ; Shiina, Takayuki*; Ota, Akio*; Takeuchi, Nobuhiro*; Ishihara, Masahiro 

Tc is used as a radiopharmaceutical in the medical field for the diagnosis, and manufactured from Mo, the parent nuclide. In this study, the solvent extraction with MEK was selected, and preliminary experiments were carried out using Re instead of Tc. Two tests were carried out in the experiments; the one is the Re extraction test with MEK from Re-Mo solution, the other is the Re recovery test from the Re-MEK. As to the Re extraction test, and it was clear that the Re extraction yield was more than 90%. Two kinds of Re recovery tests, which are an evaporation method using the evaporator and an adsorption/elution method using the alumina column, were carried out. As to the evaporation method, the Re concentration in the collected solution increased more than 150 times. As to the adsorption/elution method, the Re concentration increased in the eluted solution more than 20 times.