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2002•Chinese Journal of Spectroscopy LaboratoryRequires access

Determination of Trace Manganese in Water by Mn(II)-KIO_4-Malachite Green

Zhao Ai

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Abstract

The catalytic effect of Mn(Ⅱ) on the oxidation of malachite green by KIO 4 in a pH 4.0 HAc-NaAc buffer solution was studied.Using NTA as activator, NaF as masking agent,ascorbic acid to terminate the reaction,we developed an indirect dynamic spectrophotometry method for determinating the manganese.Its determination limit and range are 3.8×10 -11g/mL and 0.5ng/mL-2μg/mL respectively.The method has been applied to the determination of trace manganese in tea with a satisfactory result.

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What this paper is about

The catalytic effect of Mn(Ⅱ) on the oxidation of malachite green by KIO 4 in a pH 4.0 HAc-NaAc buffer solution was studied.Using NTA as activator, NaF as masking agent,ascorbic acid to terminate the reaction,we developed an indirect dynamic spectrophotometry method for determinating the manganese.Its determination limit and range are 3.8×10 -11g/mL and 0.5ng/mL-2μg/mL respectively.The method has been applied to the determination of trace manganese in tea with a satisfactory result.

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Available abstract

The catalytic effect of Mn(Ⅱ) on the oxidation of malachite green by KIO 4 in a pH 4.0 HAc-NaAc buffer solution was studied.Using NTA as activator, NaF as masking agent,ascorbic acid to terminate the reaction,we developed an indirect dynamic spectrophotometry method for determinating the manganese.Its determination limit and range are 3.8×10 -11g/mL and 0.5ng/mL-2μg/mL respectively.The method has been applied to the determination of trace manganese in tea with a satisfactory result.

Key concepts: Malachite green, Manganese, Chemistry, Spectrophotometry, Ascorbic acid, Detection limit, Masking agent, Buffer solution

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