Abstract The analysis of uranium in environmental samples, quantified using total reflection X-ray fluorescence (TXRF) analysis, would be adversely affected by the presence of rubidium and strontium in larger amounts than uranium as coexisting elements. This is because the U Lα line at 13.61 keV is close to the Rb Kα line at 13.40 keV and the Sr Kα line at 14.17 keV. Using the U Lβ1 line (instead of the U Lα line), which does not overlap with the peaks of coexisting elements, we will be able to avoid these adverse effects. Since there is no TXRF device that can perform a quantitative analysis of uranium by using the U Lβ1 line, the following modifications were made to the existing device with the intention of rapid on-site analysis. The X-ray tube of the new device has a silver anode instead of a tungsten anode, and the sensitive area of the detector was expanded. In addition, the mechanism for adjusting the position of the sample stage was changed from manual to computerized control. These changes made it possible to screen uranium in environmental samples rapidly on site without chemical separation.

中文翻译：

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存在竞争元素时铀的全反射 X 射线荧光分析

摘要 环境样品中铀的分析，使用全反射 X 射线荧光 (TXRF) 分析进行量化，将受到比铀更多的铷和锶作为共存元素的存在的不利影响。这是因为 13.61 keV 的 U Lα 线接近 13.40 keV 的 Rb Kα 线和 14.17 keV 的 Sr Kα 线。使用不与共存元素峰重叠的 U Lβ1 线（而不是 U Lα 线），我们将能够避免这些不利影响。由于目前还没有可以使用 U Lβ1 线对铀进行定量分析的 TXRF 设备，为了快速进行现场分析，对现有设备进行了以下修改。新设备的 X 射线管有一个银阳极而不是钨阳极，并扩大了探测器的敏感区域。此外，调整样品台位置的机构由手动变为计算机控制。这些变化使得无需化学分离即可在现场快速筛选环境样品中的铀成为可能。