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Study on determination of trace Cr(VI) by catalytic kinetic discoloring spectrophotometry

Yang Shui-ping

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Abstract

Based on the catalytic effect of Cr(Ⅵ) on the discoloration reaction of XCFF oxidized by H_2O_2 and KIO_3 in a medium of H_2SO_4, a new method for the determination of trace Cr(Ⅵ) was proposed and the kinetic mechanism of the reaction was investigated in detail. The detection limit is 6.40×10~(-11) g/mL and the linear range is 0～4.0×10~(-3) μg/mL for Cr(Ⅵ). It was applied to the detemination of trace Cr(Ⅵ) in food with satisfactory results.

About this research paper

What this paper is about

Based on the catalytic effect of Cr(Ⅵ) on the discoloration reaction of XCFF oxidized by H_2O_2 and KIO_3 in a medium of H_2SO_4, a new method for the determination of trace Cr(Ⅵ) was proposed and the kinetic mechanism of the reaction was investigated in detail. The detection limit is 6.40×10~(-11) g/mL and the linear range is 0～4.0×10~(-3) μg/mL for Cr(Ⅵ). It was applied to the detemination of trace Cr(Ⅵ) in food with satisfactory results.

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Available abstract

Based on the catalytic effect of Cr(Ⅵ) on the discoloration reaction of XCFF oxidized by H_2O_2 and KIO_3 in a medium of H_2SO_4, a new method for the determination of trace Cr(Ⅵ) was proposed and the kinetic mechanism of the reaction was investigated in detail. The detection limit is 6.40×10~(-11) g/mL and the linear range is 0～4.0×10~(-3) μg/mL for Cr(Ⅵ). It was applied to the detemination of trace Cr(Ⅵ) in food with satisfactory results.

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

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