Dual-wavelength dual-indicator catalytic kinetic spectrophotometry for determination of trace Ru(III)
作者：Chen, Hai-Yan，Chen, Yu-Jing，Zhang, Ming*
關(guān)鍵字：Dual-wavelength, Catalytic spectrophotometry, Ru(III), Arsenazo I, Indigo carmine
論文來源：期刊
具體來源：Rare Metals
發(fā)表時間：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.