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Fast Chemical Contrast by X-ray Fluorescence Intensity Ratio Detection
Analytical Chemistry ( IF 6.7 ) Pub Date : 2023-05-26 , DOI: 10.1021/acs.analchem.3c00623
Blanka Detlefs 1 , Serena Graziano 1 , Pieter Glatzel 1
Affiliation  

We describe a protocol for efficient detection of the chemical state of an element based on X-ray emission (fluorescence) spectroscopy using a Bragg optics spectrometer. The ratio of intensities at two appropriately chosen X-ray emission energies is a self-normalized quantity largely free of experimental artifacts and can thus be recorded with high accuracy. As the X-ray fluorescence lines are chemically sensitive, the intensity ratio identifies the chemical state. Differences between chemical states in spatially inhomogeneous or temporally evolving samples can be identified already with low numbers of photon events. This reduces the time required for data acquisition by 2 orders of magnitude as compared to recording a full spectrum.

中文翻译:

通过 X 射线荧光强度比检测进行快速化学对比

我们描述了一种使用布拉格光学光谱仪基于 X 射线发射(荧光)光谱有效检测元素化学状态的协议。两个适当选择的 X 射线发射能量的强度比是一个自归一化量,基本上没有实验伪影,因此可以高精度记录。由于 X 射线荧光线具有化学敏感性,因此强度比可识别化学状态。空间不均匀或时间演变样品中化学状态之间的差异已经可以通过少量光子事件来识别。与记录全谱相比,这将数据采集所需的时间减少了 2 个数量级。
更新日期:2023-05-26
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