Determination of Ruthenium in Waste Ruthenium Catalysts Using Inductively Coupled Plasma Optical Emission Spectrometry after Sample Digestion by High Temperature Fusion

Jian Ming Pan; Xiao Juan Wei

doi:10.4028/www.scientific.net/AMR.1033-1034.603

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Determination of Ruthenium in Waste Ruthenium Catalysts Using Inductively Coupled Plasma Optical Emission Spectrometry after Sample Digestion by High Temperature Fusion

Abstract:

A technique for determination of Ru in waste ruthenium catalysts using ICP-OES after sample digestion by high temperature fusion with NaOH-NaNO₃ mixture was described. Such experiment conditions were investigated as the influence of sample digestion methods, fusion time, fusion temperature, the dosage of NaOH-NaNO₃ mixture and interfering ions on the determination. Under the optimized conditions, the limits of detection (LODs) of Ru for tested solutions were 10 ng mL^-1. The relative standard deviations (RSDs) for Ru were 2.01 (C_Ru = 1 mg L^-1, n = 7). The linear ranges of calibration graphs for Ru were 0 ~ 100.00 mg L^-1. The proposed method was applied to determine the practical samples with good recoveries and satisfactory results.