废钐钴磁体的x射线荧光分析:一种合理的方法

IF 4.6 Q2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Recycling Pub Date : 2023-11-01 DOI:10.3390/recycling8060084
Alexandra Alexandrovna Arkhipenko, Galina Evgenievna Marina, Marina Sergeevna Doronina, Natalya Alexandrovna Korotkova, Vasilisa Borisovna Baranovskaya
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引用次数: 0

摘要

废钐钴磁体的化学成分测定是有效回收废钐钴磁体的必要条件。所述磁铁的非定型成分使分析极具挑战性。x射线荧光光谱法是一种很有前途的分析工具。它提供了高精度和简单的样品制备,因为它不需要样品溶解。然而,x射线荧光分析的一个严重限制是基体元素和杂质的光谱干扰。在这项工作中,开发了一种两阶段技术,用于使用波长色散x射线荧光光谱法测定废钐钴磁体样品中的主要成分(Sm, Co)和杂质(Fe, Cu, Zr, Hf, Ti, Ni, Mn, Cr)。为了克服所选方法的主要局限性,最大限度地提高其定性和定量分析的能力,我们提出了一种分析线和实验条件的选择方法,以及校准标准品的制备方法。所得结果与ICP-OES具有良好的相关性。检出限为0.001 ~ 0.02 wt%,定量限为0.003 ~ 0.08 wt%。
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X-ray Fluorescence Analysis of Waste Sm-Co Magnets: A Rational Approach
Determination of the chemical composition of waste Sm-Co magnets is required for their efficient recycling. The non-stereotypical composition of said magnets makes an analysis extremely challenging. X-ray fluorescence spectrometry is a promising analytical tool for this task. It offers high accuracy and simplicity of sample preparation as it does not require sample dissolution. However, a serious limitation of X-ray fluorescence analysis is the spectral interference of matrix elements and impurities. In this work, a two-stage technique has been developed for the determination of the main components (Sm, Co) and impurities (Fe, Cu, Zr, Hf, Ti, Ni, Mn, Cr) in samples of spent samarium–cobalt magnets using wavelength dispersive X-ray fluorescence spectrometry. In order to overcome the main limitation of the chosen method and to maximize its capabilities of qualitative and quantitative analysis, we propose an approach to the selection of analytical lines and experimental conditions, as well as a preparation method for the calibration standards. The obtained results have been shown to have a good correlation with ICP-OES. The limits of detection are in the range of 0.001–0.02 wt%, and the limits of quantification are 0.003–0.08 wt%.
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来源期刊
Recycling
Recycling Environmental Science-Management, Monitoring, Policy and Law
CiteScore
6.80
自引率
7.00%
发文量
84
审稿时长
11 weeks
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