Journal of Radioanalytical Chemistry

, Volume 3, Issue 3–4, pp 225–232 | Cite as

Determination of the specific activity of carrier-free125I preparations by neutron activation analysis

  • K. Heydorn


Chemical methods are unsuitable for the determination of the specific activity of commerical125I preparations because of the unknown chemical state of the iodine in solutions more than a few weeks old.125I and127I were determined in samples from seven different manufacturers by instrumental neutron activation analysis; the specific activities found ranged from about 45% to more than 90% of that of the truly carrierfree product. Correlation of the specific activities with the126I:125I ratios indicates contamination of one of the products with stable iodine during the manufacturing process.


Iodine Neutron Activation Analysis Instrumental Neutron Activation Analysis 125I Activity Total Iodine 
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Copyright information

© Akadémiai Kiadó 1969

Authors and Affiliations

  • K. Heydorn
    • 1
  1. 1.Isotope LaboratoryResearch Establishment RisöRoskilde(Denmark)

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