Patent ID: 6589796
Filing Date: 2003-07-08
Classification: G01N,Y10T

Abstract:
A iodine-measuring method for determining or detecting iodine concentration in a specimen, comprising a specimen-pretreating step of thermally digesting a specimen together with an oxidizing agent, wherein said sample is heated and then cools, and a subsequent reaction-measuring step of reacting the sample with an arsenious acid reagent solution and an ammonium cerium sulfate reagent solution and measuring absorbance in the reaction solution, wherein the specimen-pretreating step is performed under an airtight condition, using an airtight tool comprised of: (i) a specimen-pretreating reaction tool that is made of a heat-resistant and oxidation-resistant organic material and that provides reaction areas; and (ii) upper and lower fixing supporters that cover the reaction areas such that the lower fixing supporter cools earlier than the upper fixing supporter.