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2002•Chinese Journal of Spectroscopy LaboratoryRequires access

Spectrophotometric Determination of Iodine by Oxidation-Decoloration of Cresol Red

Rong Chen

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Abstract

A new method has been developed for determination of the micro amounts of iodine by oxidation decoloration with cresol red.The complex has a maximum absorption at 519.5nm in H 2SO 4 (pH0.55-0.75) with a molar absorptivity of 4.6×10 4L·mol -1 ·cm -1 .Beer's law is obeyed for 10-60μg/25mL of iodine.Good results have been achieved in determining iodine in salt and potassium iodine tablets.

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What this paper is about

A new method has been developed for determination of the micro amounts of iodine by oxidation decoloration with cresol red.The complex has a maximum absorption at 519.5nm in H 2SO 4 (pH0.55-0.75) with a molar absorptivity of 4.6×10 4L·mol -1 ·cm -1 .Beer's law is obeyed for 10-60μg/25mL of iodine.Good results have been achieved in determining iodine in salt and potassium iodine tablets.

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Available abstract

A new method has been developed for determination of the micro amounts of iodine by oxidation decoloration with cresol red.The complex has a maximum absorption at 519.5nm in H 2SO 4 (pH0.55-0.75) with a molar absorptivity of 4.6×10 4L·mol -1 ·cm -1 .Beer's law is obeyed for 10-60μg/25mL of iodine.Good results have been achieved in determining iodine in salt and potassium iodine tablets.

Key concepts: Iodine, Molar absorptivity, Chemistry, Salt (chemistry), Absorption (acoustics), Spectrophotometry, Cresol, Inorganic chemistry

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