In our laboratory, we tried to measure iodine levels by ion selective electrodes. However, our direct assays were subject to interferences from other anions like fluorine, bromine. We would like to use a resin and solvent extraction to discard the interference molecules.
You could hunt through the literature, read articles in French, Russian, and even English, e.g., http://www.ncbi.nlm.nih.gov/pubmed/4183507 or simply contact SigmaAldrich or Dow chemical since these companies make many of the resins.
Hallo!
Actually, you don't need to extract the iodine. You have to digest proteins in the urine by hydrochloric acid, for example, and the use a colorimetric method. See Clinical Chemistry 46 2000 529-535. As color reaction. Sandell-Kolkoff is usually used.
greetings
Sighart Walter Golf
April 2000 vol. 46 no. 4 529-536
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