writer：Chen, Hai-Yan，Chen, Yu-Jing，Zhang, Ming*
keywords：Dual-wavelength, Catalytic spectrophotometry, Ru(III), Arsenazo I, Indigo carmine
source：期刊
specific source：Rare Metals
Issue time：2013年
A new dual-wavelength dual-indicator catalytic kinetic spectrophotometric method for the determination of trace Ru(III) was studied. This method was based on Ru(III)-catalyzing oxidation of Arsenazo I and indigo carmine by potassium bromate in sulfuric acid. The absorbances of the catalytic and noncatalytic systems were measured at 510 and 610 nm, respectively. Under the optimum conditions, the linear range of determination is 0–0.12 μg·ml^?1 and the detection limit is 1.21 × 10^?4 μg·ml^?1. The method was applied for the determination of trace Ru(III) in ore samples with satisfactory results.