2007•Trace Elements ScienceRequires access

Determination of Trace Manganese(II) by Catalytic Kinetic Spectrophotometry

Zhenghua Luo

Abstract

A catalytic spectrophotometric method for determination of trace manganese(Ⅱ) was developed.The method is based on the catalytic effect of manganese(Ⅱ) on the oxidation reaction of bromophenol blue by KBrO3 leading to a decoloration of bromophenol blue in pH 3.5 HAc-NaAc medium.The range of determination for Mn(Ⅱ) is 0～2.8 μg/mL.The detection limit of the method is 1.13×10-11 g/mL.The method has been applied to the determination of trace manganese in the tea with satisfactory results.

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Key concepts: Bromophenol blue, Manganese, Chemistry, Spectrophotometry, Catalysis, Detection limit, TRACE (psycholinguistics), Trace Amounts