Development of the digestion method of environmental samples by the silver-mediated electrochemical oxidation process for iodine analysis

Kuwabara, Jun

Dai-12-Kai AMS Shimpojiumu Hokokushu, p.112 - 115, 2010/05

In the analysis of the iodine isotope, dry combustion method is used for sample preparation. Depending on the kind of the sample, the iodine remaining situation occurs without volatilizing enough. The silver mediated electrochemical oxidation process was tried to obtain high recovery. Digestion of dried Konbu sample was completed in around 24 hours under 5 V of electric condition. After the digestion, AgI precipitate was obtained by adding sodium sulfite as reductant to the filtered sample solution.