Kinetic Spectrophotometric Method for the Determination of Trace Ruthenium(III) by its Catalytic Effect on the Oxidation of Dibromo Caboxy Arsenazo with Bromate in Cationic Micellar Media

Abstract:

A spectrophotometric method was developed for the determination of trace Ru (III) is described, based on its catalytic effect of Ru (III) on the oxidation of dibromo caboxy arsenazo (DBCAA) by bromate in acidic and micellar medium at 100 °C. The reaction was monitored spectrophotometrically by measuring the decrease in the absorbance of the catalytic reaction of DBCAA at 530 nm with a fixed-time method. The calibration curve for the recommended method was linear in the concentration range over 0.037–1.0 µg/L and the detection limit of the method for Ru (III) was 0.011 µg/L. The method was applied to the determination of Ru (III) in some ores and metallurgy products. The results are in good agreement with the recommend values with the relative standard deviation of 2.6 %–3.8 % and the recovery of 97.2 %–104.3 %.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1289-1293
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1289
• Online since: December 2012
• Authors: Zhi Rong Zhou, Li Zhen Zhang
• Keywords: Catalytic Kinetic Spectrophotometry, Dibromo Caboxy Arsenazo, Micellar Media, Potassium Bromate, Ruthenium (III)

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