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Determination of Radioiodide Contamination of Radio-Hippuran and Other Radioiodinated Organic Salts

ABSTRACT

A simple technique for the estimation of radioiodide contamination in water soluble, carbon tetrachloride insoluble, radioiodinated organic compounds is described. Aqueous samples are treated by swirling for one hour with a layer of carbon tetrachloride saturated with nonradioactive elemental iodine. The disproportionation of the original radioactivity between the aqueous and I₂-CCl₄ layers after equilibrium is determined, and the per cent of radioactivity originally present as radioiodide is calculated therefrom. The activity originally present as radioiodide transfers into the I₂-CCl₄ layer, leaving the radio-organic compound in the aqueous layer.

FOOTNOTES

¹ Department of Radiology, Bowman Gray School of Medicine, Wake Forest College, Winston-Salem, North Carolina.

Performed under USPHS Research Grant No. 5418. National Institute of Health.