Spectrophotometric Determination of Iodine in the Salts by Oxidation-Decoloration of Eriochrome Black T

Abstract

Abstract: A new method has been developed for determination of the trace iodine by oxidation-decoloration with Eriochrome black T. The color system had a maximum absorption at 510nm in the medium of sulfuric acid. Beer’s law was obeyed in the range of 0～1.0mg/L of iodine. The relative standard deviation was in the range of 0.24%～0.28%. The recovery was 98.7%～ 103.6%. The method could be used for determination of the trace iodine in salts.

Key words: eriochrome black T, iodine, oxidation-decoloration spectrophotometry

XU Mao-Rong. Spectrophotometric Determination of Iodine in the Salts by Oxidation-Decoloration of Eriochrome Black T[J]. FOOD SCIENCE, 2005, 26(10): 179-180.

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Spectrophotometric Determination of Iodine in the Salts by Oxidation-Decoloration of Eriochrome Black T

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