2002•Chemical ResearchesRequires access
Photometric Determination of Iodine in Table Salt by a Times-increasing Reaction
Hu Zhang
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Abstract
It is found that I - is oxidized by iodate in a H 2SO 4 medium, and I - 3 is tripled as a result. But, I - 3 has the maximum absorption at the wavelength of 288 nm, and the apparent molar absorptivity obtained at this wavelength is 1.3×10 5L·mol -1 ·cm -1 . So the sensitivity is enhanced. The study also suggests that in the range of 0～60μg/100mL the concentrations of iodate fit Beer's law.