In the production of radioiodine via charged particle activation of isotopi
cally enriched TeO2 and subsequent heating of the irradiated target, some T
eO2 is lost. Again, use of recovered TeO2 for radioiodine production showed
that impurities are present, which prevent complete volatilization of radi
oiodine from the heated target. An effective purification procedure for rec
overed TeO2 has been developed, resulting in a yield of 95-97%. The procedu
re developed may also be used to purify Te metal. (C) 2001 Elsevier Science
Ltd. All rights reserved.