Method for determining iodine-127 in soils

Abstract

Abstract A method was presented for determining the content of stable iodine-127 (127I) in soil samples. The method is based on the reaction rate of cerium cation (IV) with arsene (III) anion. The rate of this reaction is catalysed with the amount of iodide anions (I−) in a mineralised soil sample. The method is precise, with repeatable results, and it is ready for common application. The method was verified with the use of an analytical sample manufactured by POCH SA: TitraFix™ analytical sample of potassium iodateiodide 0.05 mol·dm−3 I2 (0.1N), (index: 743110161-020-1, tolerance range: ± 0.2%).