Abstract
The present study introduces a new approach based on an irradiated tin target's impurity to produce a125Sb/125mTe radioisotope generator. A prepared generator gel matrix of zirconium-silico-tungstate was loaded with 6660 MBq (180 mCi) activity of the separated antimony. The loading and elution method has been studied as a function of the concentration of H2SO4 acid solution. The effect of mild oxidant (ascorbic acid) in the loading and complexing agent (acetic acid) in elution was investigated to improve the generator's elution profile. A mixture of (0.5 M) ascorbic acid and (0.5 M) H2SO4 acid solution as a loading solution resulted in a maximum distribution of 125Sb. In comparison, using (0.4 M) acetic acid as an eluent solution 125mTe yield reached 88.7% and minimised percentage of 125Sb breakthrough was obtained (<0.01%).
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