The aim of this study was the comparison of the results obtained in the determination of the content of essential elements such as Mn, Fe, Cu and Zn in vegetation samples using different analytical approaches, including suspension preparation and total reflection X-ray fluorescence (TXRF) analysis as well as most commonly used spectroscopic methods in the field of vegetal analysis such as acid digestion in combination with atomic emission (AES) and atomic absorption spectrometry (AAS). In the case of TXRF analysis, two instruments equipped with different X-ray tubes anodes (W and Mo) were used to better evaluate the potential of TXRF for vegetal samples analysis. Analytical figures of merit for the considered methods were determined by the analysis of plant reference materials. The one-way analysis of variance (ANOVA) applied to the analysed and certified values showed that the results were not statistically different at the significance level of p-values <0.05. Therefore, suspension preparation and TXRF analysis proved to be a sustainable and fast analytical alternative to the most commonly used ones involving a previous digestion of the sample and inductively coupled plasma optical emission spectrometry (ICP-OES) or flame atomic absorption spectrometry (FAAS) analysis. Finally, the different analytical approaches were applied to the determination of Mn, Fe, Cu and Zn in a set of herbal teas used for medical purposes.

中文翻译：

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通过 TXRF、FAAS 和 ICP-OES 测定凉茶中的必需元素（Mn、Fe、Cu 和 Zn）

本研究的目的是比较使用不同分析方法（包括悬浮液制备和全反射 X 射线荧光法）测定植被样品中 Mn、Fe、Cu 和 Zn 等基本元素含量的结果。TXRF) 分析以及植物分析领域最常用的光谱方法，例如酸消解结合原子发射 (AES) 和原子吸收光谱 (AAS)。在 TXRF 分析的情况下，两个配备不同 X 射线管阳极（W 和 Mo）的仪器被用来更好地评估 TXRF 在植物样品分析中的潜力。所考虑方法的分析品质因数通过植物参考材料的分析确定。应用于分析和认证值的单向方差分析 (ANOVA) 表明，结果在p-的显着性水平上没有统计学差异值 <0.05。因此，悬浮液制备和 TXRF 分析被证明是一种可持续且快速的分析替代方法，可替代最常用的分析方法，这些方法包括先前的样品消解和电感耦合等离子体发射光谱法 (ICP-OES) 或火焰原子吸收光谱法 (FAAS) 分析. 最后，将不同的分析方法应用于一组药用凉茶中 Mn、Fe、Cu 和 Zn 的测定。