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-NaNO3mixture was described. Such experiment conditions were investigated as the influence of sample digestion methods, fusion time, fusion temperature, the dosage of NaOH-NaNO3mixture 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 (CRu= 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.