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2002•Chinese Journal of Spectroscopy LaboratoryRequires access

Determination of trace Cr(VI) with Cr(VI) -Potassium Bromate-Crystal Violet System

Feng Shang

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Abstract

Based on the catalytic effect of trace chromium(Ⅵ) on the oxidation of crystallize violet with potassium bromate in the medium of H 3PO 4,a determination methed of chromium(Ⅵ) was established by catalytic spectrophotometry.The detection limit for chromium(Ⅵ) is 2.5×10 -9 g/L .The linear range of the determination is 7.4-148.0ng/mL and the recoveries are 99.6%-102.2%.The method is used for the determination of chromium(Ⅵ) in water with satisfactory results.

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Based on the catalytic effect of trace chromium(Ⅵ) on the oxidation of crystallize violet with potassium bromate in the medium of H 3PO 4,a determination methed of chromium(Ⅵ) was established by catalytic spectrophotometry.The detection limit for chromium(Ⅵ) is 2.5×10 -9 g/L .The linear range of the determination is 7.4-148.0ng/mL and the recoveries are 99.6%-102.2%.The method is used for the determination of chromium(Ⅵ) in water with satisfactory results.

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Available abstract

Based on the catalytic effect of trace chromium(Ⅵ) on the oxidation of crystallize violet with potassium bromate in the medium of H 3PO 4,a determination methed of chromium(Ⅵ) was established by catalytic spectrophotometry.The detection limit for chromium(Ⅵ) is 2.5×10 -9 g/L .The linear range of the determination is 7.4-148.0ng/mL and the recoveries are 99.6%-102.2%.The method is used for the determination of chromium(Ⅵ) in water with satisfactory results.

Key concepts: Potassium bromate, Chromium, Crystal violet, Chemistry, Bromate, Detection limit, Spectrophotometry, Potassium

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