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2004•Journal of Huaibei Industry Teachers CollegeRequires access

Determination of Trace Amounts of Iodine by Inhibition Kinetic Spectrophotometry

Zhen Zhang

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Abstract

A simple and sensitive kinetic spectrophotometric method for determination of trace amounts of iodine has been developed. The method is based on theinhibition effect of iodine on the nitrite catalyzed oxidation of thymol blue by potassium bromate in dilute sulphuric acid medium.The linear range of determination is 0～0.32 μg/mL. The detection limit is 8.96×10-8 g/mL.The method has been used for the determination of micro amounts of iodine in medicinal tablet with satisfactory results.

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What this paper is about

A simple and sensitive kinetic spectrophotometric method for determination of trace amounts of iodine has been developed. The method is based on theinhibition effect of iodine on the nitrite catalyzed oxidation of thymol blue by potassium bromate in dilute sulphuric acid medium.The linear range of determination is 0～0.32 μg/mL. The detection limit is 8.96×10-8 g/mL.The method has been used for the determination of micro amounts of iodine in medicinal tablet with satisfactory results.

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Available abstract

A simple and sensitive kinetic spectrophotometric method for determination of trace amounts of iodine has been developed. The method is based on theinhibition effect of iodine on the nitrite catalyzed oxidation of thymol blue by potassium bromate in dilute sulphuric acid medium.The linear range of determination is 0～0.32 μg/mL. The detection limit is 8.96×10-8 g/mL.The method has been used for the determination of micro amounts of iodine in medicinal tablet with satisfactory results.

Key concepts: Potassium bromate, Iodine, Chemistry, Detection limit, Spectrophotometry, Linear range, Trace Amounts, Nitrite

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