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Catalytic Spectrophotometry for the Determination of Trace Chromium(VI)

Zhang Xiu-xiang

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Abstract

The catalytic spectrophotometric determination of trace chromium (Ⅵ) has been investigated. This method is based on the Cr(Ⅵ) can catalyze the decolouring oxidation reaction of arsenazo Ⅰ by H 2O 2 in the medium of sulphuric acid. The linear range of measurements is 0.5-12.0 μgCr(Ⅵ)/25mL and the detection limit is 6.4×10 -12 g/L. The proposed method has been successfully applied to the determination of Cr(Ⅵ) in water, steel and aluminum alloy samples.

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What this paper is about

The catalytic spectrophotometric determination of trace chromium (Ⅵ) has been investigated. This method is based on the Cr(Ⅵ) can catalyze the decolouring oxidation reaction of arsenazo Ⅰ by H 2O 2 in the medium of sulphuric acid. The linear range of measurements is 0.5-12.0 μgCr(Ⅵ)/25mL and the detection limit is 6.4×10 -12 g/L. The proposed method has been successfully applied to the determination of Cr(Ⅵ) in water, steel and aluminum alloy samples.

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Available abstract

The catalytic spectrophotometric determination of trace chromium (Ⅵ) has been investigated. This method is based on the Cr(Ⅵ) can catalyze the decolouring oxidation reaction of arsenazo Ⅰ by H 2O 2 in the medium of sulphuric acid. The linear range of measurements is 0.5-12.0 μgCr(Ⅵ)/25mL and the detection limit is 6.4×10 -12 g/L. The proposed method has been successfully applied to the determination of Cr(Ⅵ) in water, steel and aluminum alloy samples.

Key concepts: Chromium, Spectrophotometry, Detection limit, Catalysis, Linear range, Chemistry, Alloy, Aluminium

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