Abstract

124I is a radionuclide used in the diagnosis of tumors. The National Health Agency requires identification and activity measurement of impurities. Using gamma spectrometry with an efficiency calibrated high-purity germanium detector, impurities 125I and 126I in an 124I production sample were identified. Activity ratios of 125I and 126I to 124I were approximately 0.5% and 98%, respectively.

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