2001•Journal of Analytical ScienceRequires access

Studies on the Determination of Micro Iodine by Minus Catalytic Kinetic Spectrophotometry

Dalun Zhang

Abstract

A new method for the determination of micro iodine ion has been described, which is based on the minus catalytic effect of iodine on the oxidation of Rhodamine B by K 2Cr 2O 7. The molar absorption coefficient is 6.7×10 4 L·mol -1 ·cm -1 . The linear range of iodine is 0~1.6 μg·mL -1 . The method has been used in the determination of micro iodine in food with satisfactory results.

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Key concepts: Chemistry, Iodine, Rhodamine B, Spectrophotometry, Catalysis, Linear range, Molar absorptivity, Inorganic chemistry