X射线荧光光谱法测定铜精矿中铜的不确定度评定  

Uncertainty Assessment of Copper in Pure Copper by X-ray Fluorescence Spectroscopy

作　　者：陈嬿娉 刘志英 李明茂[2] 章新亮 刘奇 王丽丽 袁江山 Chen Yan-ping;Liu Zhi-ying;Li Ming-mao;Zhang Xin-liang;Liu Qi;Wang Li-li;Yuan Jiang-shan(Yingtan Institute of Inspection,Testing and Certification,Yingtan Jiangxi 335000,China;Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)

机构地区：[1]鹰潭市检验检测认证院,江西鹰潭335000 [2]江西理工大学,江西赣州341000

出　　处：《江西化工》2023年第5期33-37,共5页Jiangxi Chemical Industry

基　　金：江西省市场监督管理局科技项目(GSJK202124);江西省科技厅重大科技研发专项(20213AAE01007)。

摘　　要：建立微波消解-能量色散X射线荧光光谱法测定铜精矿中铜含量的不确定度评定方法。依据不确定度评定要求和该方法测定铜精矿中铜含量的数学模型,分别计算标准溶液配制、标准曲线拟合、试样称量、试样消解、消解液定容、测试重复性各自引入的相对标准不确定度,得到扩展不确定度。采用置信概率为95%,铜精矿中铜含量测定结果为(16.59±1.40)%。影响结果不确定度的主要分量的贡献依次为测试重复性、校准曲线拟合、试样消解、标准溶液配制、试样称量及消解液定容。To establish an uncertainty evaluation method for the determination of copper content in copper concentrate by microwave digestion-energy dispersive X-ray fluorescence spectrometry.According to the uncertainty assessment requirements and the mathematical model for the determination of copper content in copper concentrates by this method,the standard solution preparation,standard curve fitting,sample weighing,sample digestion,digestion solution constant volume,and test repeatability are respectively introduced.The relative standard uncertainty of,get the expanded uncertainty.Using a confidence probability of 95%,the copper content in the copper concentrate was determined to be(16.59±1.40)%.The main components that affect the uncertainty of the results are the test repeatability,calibration curve fitting,sample digestion,standard solution preparation,sample weighing and digestion solution constant volume.

关 键 词：不确定度 能量色散X射线荧光光谱法(EDXRF) 铜精矿 铜 

分 类 号：O657.34[理学—分析化学] TF811[理学—化学]