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The radioisotope  89 Sr as  89 SrCl 2  is medically useful for bone pain palliation and is produced in fast reactors using the  89 Y(n, p) 89 Sr reaction. A procedure for isolation of the radionuclide  89 Sr by chemical processing of the irradiated Y 2 O 3  target has been standardised and trial runs have been carried out at the Fast Breeder Test Reactor (FBTR), Kalpakkam. The chemical processing of the irradiated Y 2 O 3  target involves i) the removal of target Y(III) by TBP extraction and ii) further purification of the separated  89 Sr fraction by cationic exchange chromatography. However a selective isolation of  89 Sr by the Sr-specific crown ether makes the above chemical processing faster and relatively simple. This work presents a study on the selective removal of Sr from the irradiated target dissolver solution using the Sr-specific crown ether 4,4′(5′) di-tert-butyl-cyclohexano-18-crown-6 (DtBuCH18C6) in octanol medium. The separation behaviour of the other impurities such as Ce(IV), Y(III), Tb(III), Eu(III), Zn(II), Mn(II) and Rb(I) present along with Sr(II) in the irradiated sample was also investigated. The method of separation by using the crown ether DtBuCH18C6 is proved to be a potential tool for the purification of  89 Sr(II) source produced from yttria target in fast reactors.

radiochimica acta

Studies on the separation of 89 Sr(II) from irradiated yttria target using 4, 4′(5′) di-tert-butyl-cyclohexano-18-crown-6 (DtBuCH18C6) by solvent extraction technique