Determination of copper in copper and copper alloy by acid digestion and energy dispersive X-ray fluorescence spectrometry
LIU Zhiying1, LI Mingmao*2, LIU Qi1, WANG Lili1, ZHANG Xinliang1, YUAN Jiangshan1
1. Yingtan Institute of Inspection,Testing and Certification,Yingtan 335000,China; 2. Jiangxi University of Science and Technology,Ganzhou 341000,China
Abstract：In order to solve the problem of large error during the determination of copper content in copper and copper alloys by energy dispersive X-ray fluorescence spectroscopy (EDXRF), the sample was pretreated by acid decomposition in experiments. The copper standard solution series were prepared with standard solution. The calibration curve was drawn with the mass concentration of copper as the abscissa and the fluorescence intensity as the ordinate. A method for the determination of copper in copper and copper alloys by EDXRF after acid digestion was established. The effects of wetting water consumption, hydrochloric acid dosage, nitric acid dosage and post-reaction treatment on the determination were investigated by orthogonal tests, and the optimal acid digestion conditions were obtained. The contents of copper in four copper and copper alloy CRMs were determined according to the experimental method. The relative standard deviations (RSD, n=13) of determination results were between 0.32% and 0.68%. The measured values were weill consistent with the certified values. The contents of copper in four copper products were determined according to the experimental method and GB/T 5121.1-2008, and it was found that the test results were consistent. The proposed method could well overcome the matrix effect and solve the matching problem of solid standard sample. This method could meet the requirements of daily inspection.
刘志英, 李明茂, 刘奇, 王丽丽, 章新亮, 袁江山. 酸消解-能量色散X射线荧光光谱法测定铜及铜合金中铜[J]. 冶金分析, 2023, 43(11): 39-44.
LIU Zhiying, LI Mingmao, LIU Qi, WANG Lili, ZHANG Xinliang, YUAN Jiangshan. Determination of copper in copper and copper alloy by acid digestion and energy dispersive X-ray fluorescence spectrometry. , 2023, 43(11): 39-44.
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