Determination of the specific activity of carrier-free 125I preparations by neutron activation analysis

Kaj Heydorn

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    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.
    Original languageEnglish
    JournalJournal of Radioanalytical Chemistry
    Volume3
    Issue number3-4
    Pages (from-to)225-232
    ISSN0022-4081
    DOIs
    Publication statusPublished - 1969

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