Determination of copper and trace elements in pure copper by electrolytic gravimetry and inductively coupled plasma mass spectrometry
TANG Yu, HU Weizhu, WANG Yapeng
Technical Center of Ben Gang Group Corporation,China National and Local Joint Engineering Laboratory of Advanced Automotive Steel Development and Application Technology,Benxi 117000,China
Abstract：Copper and trace elements in pure copper affect the physical and chemical properties of materials, so it is of great significance to determine their contents accurately. In this study, the pure copper sample was dissolved with nitric acid, and the digestion solution was electrolyzed with direct current power supply. The mass difference of platinum net before and after electrolysis was obtained by weighting, which was used to divide the mass of sample to calculate the copper content in sample. The contents of trace elements in the electrolyte were determined by inductively coupled plasma mass spectrometry (ICP-MS). Accordingly, through the combination of electrolytic gravimetry and ICP-MS, the method of determining copper and trace elements in pure copper was established after one electrolysis. The content of copper matrix in the electrolyte was analyzed by inductively coupled plasma atomic emission spectrometry. The results showed that the mass concentration of copper matrix in the test solution was about 0.5 μg/mL. The results of matrix effect tests showed that the copper matrix in electrolyte had a negligible effect on the determination of trace elements. Under the selected experimental conditions, the linear correlation coefficients of the calibration curves of trace elements were all greater than 0.999 0. The limits of detection were 0.010-0.025 μg/L, and the limits of quantification were 0.03-0.08 μg/L. The experimental method was applied to the analysis of certified reference material(CRM) and actual sample of pure copper. The results showed that the measured values were basically consistent with the certified values. The relative standard deviations (RSD, n=9) of determination results were between 0.097% and 4.8%, and the spiked recoveries were between 96% and 105%. For the actual sample, the measured results of each element were basically consistent with those obtained by the standard method, and the RSD (n=9) of determination results were 0.096%-5.0%.
唐语, 胡维铸, 王亚朋. 电解重量法-电感耦合等离子体质谱法联合测定纯铜中铜和痕量元素[J]. 冶金分析, 2023, 43(11): 45-50.
TANG Yu, HU Weizhu, WANG Yapeng. Determination of copper and trace elements in pure copper by electrolytic gravimetry and inductively coupled plasma mass spectrometry. , 2023, 43(11): 45-50.
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