岩矿测试2018，Vol.37Issue(3)：298-305,8.DOI:10.15898/j.cnki.11-2131/td.201706280113
熔融制样-X射线荧光光谱法测定稀土矿石中的主量元素和稀土元素
Determination of Major and Rare Earth Elements in Rare Earth Ores by X-ray Fluorescence Spectrometry with Fusion Sample Preparation
摘要
Abstract
BACKGROUND:The analysis of ore samples by X-ray Fluorescence Spectrometry (XRF)has the advantages of quantitative accuracy,less reagent and good reproducibility.However,due to the lack of rare earth standard materials at present,the accurate quantitative requirements for complex rare earth ore samples cannot be met. OBJECTIVES:To establish the analysis method for XRF determination of 25 major elements and rare earth elements in rare earth ores and mineralized samples. METHODS:The use of artificial standard samples solved the problem of lack of standard materials.The linear ranges of La,Ce and Y were extended by adding high purity rare earth oxides La2O3,CeO2and Y2O3. A calibration line was produced using artificial standard samples,existing standard materials of rare earth and carbonate.The major elements were calibrated by a theoretical alpha coefficient method,whereas the rare earth elements were calibrated by an empirical coefficient method.Interference correction was used for elements with overlapping spectral lines. RESULTS:The relative standard deviations (RSD,n ＝13 )of most major elements were less than 1.5%, whereas the RSDs of rare earth elements were 0.69%-6.94% when their concentrations were above 300 μg／g. CONCLUSIONS:The method was evaluated by unknown samples and the sums of major elements,rare earth elements and loss of ignition were 99.41% -100.63%.The method satisfies the first criterion of Geology and Minerals Laboratory Testing Quality Management Standards.关键词
稀土矿石/X射线荧光光谱法/基体效应/人工标准样品Key words
rare earth ore/X-ray Fluorescence Spectrometry/matrix effect/artificial standard substances分类
化学化工引用本文复制引用
周伟,曾梦,王健,张磊,李迎春..熔融制样-X射线荧光光谱法测定稀土矿石中的主量元素和稀土元素[J].岩矿测试,2018,37(3):298-305,8.基金项目
中国地质调查局地质调查工作项目(DD20179152) （DD20179152）
