Simultaneous Determination of Ruthenium, Zinc and Zirconium in Waste Zirconium Dioxide Loaded Ruthenium-Zinc Catalysts Using Inductively Coupled Plasma Optical Emission Spectrometry

Xiao Juan Wei; Jian Ming Pan

doi:10.4028/www.scientific.net/AMR.989-994.480

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 989-994Simultaneous Determination of Ruthenium, Zinc and...

Simultaneous Determination of Ruthenium, Zinc and Zirconium in Waste Zirconium Dioxide Loaded Ruthenium-Zinc Catalysts Using Inductively Coupled Plasma Optical Emission Spectrometry

Abstract:

A technique for simultaneous determination of Ru, Zn and Zr in waste Ru-Zn/ZrO₂ catalysts using ICP-OES after sample digestion by high temperature fusion with KOH-KNO₃ mixture was described. Such experiment conditions were investigated as the influence of sample digestion methods, fusion time, fusion temperature, the dosage of KOH-KNO₃ mixture and interfering ions on the determination. Under the optimized conditions, the limits of detection (LODs) of Ru, Zn and Zr for tested solutions were 11, 8 and 5 ng mL^-1, respectively. The relative standard deviations (RSDs) for Ru, Zn and Zr were 2.01, 2.55 and 1.92 % (C_Ru_{, Zn}_,_Zr = 1 mg L^-1, n = 7), respectively. The linear ranges of calibration graphs for Ru, Zn and Zr were 0 ~ 100.00 mg L^-1, 0 ~ 50.00 mg L^-1 and 0~60.00 mg L^-1, respectively. The proposed method was applied to determine the practical samples with good recoveries and satisfactory results.