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2002•Chinese Journal of Spectroscopy LaboratoryRequires access

Determination of Trace Manganese in Tea by Catalytic Dynamical Photometric Method

Yang Xiu

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Abstract

The catalytic action of Mn(Ⅱ)on oxidation of malachite green using KlO 4 in a pH4 0 HAc\|NaAc buffer solution was studied. Using NTA as activator, NaF as masking agent, ascorbic acid to terminate the reaction. An indirect dynamic photometric method of determination the manganese was developed.The detection limit and range are 3.8×10 -11 g/mL and 0-2μg/mL respectively. The method has been applied to the determination of trace manganese in tea and gives out a satisfactory result.

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The catalytic action of Mn(Ⅱ)on oxidation of malachite green using KlO 4 in a pH4 0 HAc\|NaAc buffer solution was studied. Using NTA as activator, NaF as masking agent, ascorbic acid to terminate the reaction. An indirect dynamic photometric method of determination the manganese was developed.The detection limit and range are 3.8×10 -11 g/mL and 0-2μg/mL respectively. The method has been applied to the determination of trace manganese in tea and gives out a satisfactory result.

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Available abstract

The catalytic action of Mn(Ⅱ)on oxidation of malachite green using KlO 4 in a pH4 0 HAc\|NaAc buffer solution was studied. Using NTA as activator, NaF as masking agent, ascorbic acid to terminate the reaction. An indirect dynamic photometric method of determination the manganese was developed.The detection limit and range are 3.8×10 -11 g/mL and 0-2μg/mL respectively. The method has been applied to the determination of trace manganese in tea and gives out a satisfactory result.

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

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