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2001•Journal of Nanchang UniversityRequires access

SYUDY ON THE DETERMINATION OF TRACE Cr(VI) BY CATALYTIC KINETIC-SPECTROPHOTOMETRY

Yang Huang

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Abstract

It has been observed that Cr(Ⅵ) can sensitively catalyze the reaction of H 2O 2 oxidating discoloration of the Arsenazo Ⅰ in NH 3·H 2O medium.The kinetics mechanism of the reaction was investigated in detail and a new method for the determination of trace Cr(Ⅵ) was proposed.The detection limit is 7.27×10 -11 g/mL and the linear range is 0-0.10μg/25mL of Cr(Ⅵ) .It has been applied satisfactorily to the determination of trace Cr(Ⅵ) in some water.

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What this paper is about

It has been observed that Cr(Ⅵ) can sensitively catalyze the reaction of H 2O 2 oxidating discoloration of the Arsenazo Ⅰ in NH 3·H 2O medium.The kinetics mechanism of the reaction was investigated in detail and a new method for the determination of trace Cr(Ⅵ) was proposed.The detection limit is 7.27×10 -11 g/mL and the linear range is 0-0.10μg/25mL of Cr(Ⅵ) .It has been applied satisfactorily to the determination of trace Cr(Ⅵ) in some water.

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Available abstract

It has been observed that Cr(Ⅵ) can sensitively catalyze the reaction of H 2O 2 oxidating discoloration of the Arsenazo Ⅰ in NH 3·H 2O medium.The kinetics mechanism of the reaction was investigated in detail and a new method for the determination of trace Cr(Ⅵ) was proposed.The detection limit is 7.27×10 -11 g/mL and the linear range is 0-0.10μg/25mL of Cr(Ⅵ) .It has been applied satisfactorily to the determination of trace Cr(Ⅵ) in some water.

Key concepts: Linear range, Spectrophotometry, Detection limit, Catalysis, TRACE (psycholinguistics), Chemistry, Kinetic energy, Kinetics

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