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Determination of iodine content using ion exchange chromatography

✍ Scribed by J. Csapó; I. Sarudi

Publisher
Elsevier Science
Year
1992
Weight
72 KB
Volume
17
Category
Article
ISSN
0923-1137

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✦ Synopsis

A chromatographic method using an ion exchange column has been developed for the determination of the iodine content in biological materials, foods, fodders and mineral premixes. The method is based on the reaction between iodine and tyrosine resulting in the formation of 3-iodotyrosine and 3,5-diiodotyrosine. The reaction can be influenced with increasing the tyrosine concentration to form 3-iodotyrosine rather than the diiodo compound. The increased concentration of tyrosine results in a 3,5-diiodotyrosine concentration below the detection limit. The relative standard deviation of the analysis is 5% and the limit of determination is 0.1 mg/kg.

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