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Influence of soil sample grain size on energy dispersive X-ray fluorescence analysis: a comparative study case with three spectrometers
Spectroscopy Letters ( IF 1.7 ) Pub Date : 2021-08-06 , DOI: 10.1080/00387010.2021.1957941
Matheus Gil de Freitas 1 , Felipe Rodrigues dos Santos 1 , Paulo Sérgio Parreira 1 , Fábio Luiz Melquiades 1
Affiliation  

Abstract

This study aims at evaluating the particle size influence on the quantitative Energy Dispersive X-ray Fluorescence data of tropical soils, as well as evaluating the results trueness and precision using different statistical approaches. These objectives were conducted in three spectrometers, a benchtop one, and two portable ones. Certified reference materials were employed in calibration and trueness evaluation. Soil samples were collected, grounded and sieved in particle sizes: macerated (>2 mm), <2, <0.7, <0.3, <0.125, and <0.06 mm. The three spectrometers had different performances and lack of trueness for Potassium and Zinc in the Lab-made spectrometer. Regarding the grain size parameters, the spectrometers responded in different ways. It was identified that the best soil grain size condition for one of the portable spectrometers was <0.06 mm, while for the benchtop and for the other portable spectrometer the best soil grain size was <0.125 mm. In summary, the soil grain size affected the quantitative results in Energy Dispersive X-ray Fluorescence measurements, but it depends on the sensitivity of each spectrometer and the element of interest.



中文翻译:

土壤样品粒度对能量色散X射线荧光分析的影响:三台光谱仪对比研究

摘要

本研究旨在评估粒径对热带土壤定量能量色散 X 射线荧光数据的影响,以及使用不同统计方法评估结果的真实性和精度。这些目标是在三台光谱仪、一台台式光谱仪和两台便携式光谱仪中进行的。经认证的标准物质用于校准和正确度评估。土壤样品被收集、研磨并按以下粒度进行筛分:浸渍 (>2 mm)、<2、<0.7、<0.3、<0.125 和 <0.06 mm。三款光谱仪在实验室自制光谱仪中对钾和锌的准确度不一。关于晶粒尺寸参数,光谱仪以不同的方式响应。经鉴定,其中一台便携式光谱仪的最佳土壤粒度条件为 <0.06 mm,而台式光谱仪和另一台便携式光谱仪的最佳土壤粒度条件为 <0.125 mm。总之,土壤粒度影响能量色散 X 射线荧光测量的定量结果,但它取决于每个光谱仪的灵敏度和感兴趣的元素。

更新日期:2021-08-30
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