Abstract

A combined use of comparator instrumental neutron activation analysis (INAA) including the internal standard method and energy-dispersive X-ray fluorescence spectrometry (EDXRF) for the determination of 14 rare-earth elements (REE) in geological samples at the level of their clarke concentrations is studied. A rapid analysis with the determination of light REE from La to Sm with Fe as an internal standard is performed using a portable RLP-21T energy-dispersive X-ray fluorescence spectrometer (Republic of Kazakhstan) with the excitation of K-series lines of characteristic radiation of a sample with a low-power (10 W) X-ray tube with a tungsten anode and the maximum voltage 70 kV. The neutron activation analysis of other REE was performed using a WWR-K nuclear research reactor. Based on the analysis of ten certified reference materials of geological samples, a possibility of using a complex of INAA and EDXRF methods for routine qualitative analyses of REE in the III accuracy class in accordance with the branch standard OST41-08-212-04 is shown. Examples of using a complex of INAA and EDXRF methods for solving geochemical problems and determining REE in out-of-balance ores of the Kundybay deposit are presented.

中文翻译：

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仪器中子活化分析与X射线荧光光谱法相结合测定地质样品中的稀土元素

摘要

比较器仪器中子活化分析（INAA）的组合使用，包括内标方法和能量色散X射线荧光光谱法（EDXRF），用于测定地质样品中的14种稀土元素（clarke）水平研究浓度。使用便携式RLP-21T能量色散X射线荧光光谱仪（哈萨克斯坦共和国），以K-激发，快速测定了以Fe为内标的从La到Sm的光REE。低功率（10 W）X射线管（带钨阳极）和最大电压70 kV的样品的特征辐射的一系列串联线。使用WWR-K核研究反应堆对其他稀土元素进行中子活化分析。基于的地质样品的10标准物质的分析中，根据该分支标准使用复杂的和INAA EDXRF方法在III精度等级REE的常规定性分析的可能性OST 41 - 08-212-04是如图所示。给出了使用INAA和EDXRF方法复杂解决地球化学问题并确定Kundybay矿床不平衡矿石中REE的示例。