2004•Chemical engineerRequires access

Determination of trace manganese(II) by catalytic kinetic spectrophotometry

Yan Jin

Abstract

A catalytic spectrophotometric method for determination of trace manganese(Ⅱ) was developed.Themethod is based on the catalytic effect of manganese(Ⅱ) on the oxidation reaction of methyl violet by KBrO 3 leading to a decoloration of methyl violet.The range of determination for Mn(Ⅱ) is 0～1μg/25mL and 1～5μg/25mL.The detection limit of the method is 1.2×10 -9 g.mL -1 .The method has been applied to the determination of trace manganese in rice and flour with satisfactory results.

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Key concepts: Manganese, Spectrophotometry, Chemistry, Detection limit, Catalysis, Methyl violet, Potassium periodate, Nuclear chemistry