Determination of Ruthenium in Carbon-borne Ruthenium Catalyst by Alkali Melting Inductively Coupled Plasma Atomic Emission Spectroscopy(ICP-AES)Method
Ruthenium,as an acid refractory substance,has low detection accuracy by using inductively coupled plasma atomic emission spectroscopy(ICP-AES)after conventional acid dissolution treatment.In order to accurately analyze the content of ruthenium in precious metal catalysts,an alkali melting-inductively coupled plasma atomic emission spectroscopy(ICP-AES)method was designed in this study.During the experiment,potassium hydroxide was used for sample melting,and ruthenium 267.876 nm was selected as the analytical line.After a series of experimental exploration,it was determined that 0.4 g sample was added to 2.0 g potassium hydroxide,and the heating reaction in 400℃mafer furnace for 5 min was the most suitable melting condition.The linear correlation coefficient of the calibration curve of this element can reach 0.999 with a detection limit of 0.019 mg/L.The experimental method is applied to the determination of ruthenium in the sample,and the standard deviation and spike recovery of the measurement results are within the allowable range,which can meet the requirements of the determination of ruthenium content in the carbon-borne ruthenium catalyst.