The Study on the State of Tangle's Iodine with Radioactive Iodine (Part 1)

On the change of ¹³¹I and I content and the difference of their state in a dried tangle added with ¹³¹I

Abstract

Iodine in a dried tangle was mostly inorganic iodine and dissolved in water. A little organic iodine existed together inorganic iodine in that solution. By boiling the solution, inorganic iodine decreased remarkably while organic iodine increased. It was thought that some of the organic iodine were compounds of iodine and tannic acids in a tangle.
The loss of iodine by oxidative decomposition by heat of a tangle was very little at 500°C.