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Determination of Te, As, Bi, Sb and Se (TABS) in Geological Reference Materials and GeoPT Proficiency Test Materials by Hydride Generation‐Atomic Fluorescence Spectrometry (HG‐AFS)
Geostandards and Geoanalytical Research ( IF 3.8 ) Pub Date : 2019-09-20 , DOI: 10.1111/ggr.12289
Eduardo Teixeira Mansur 1 , Sarah‐Jane Barnes 1 , Dany Savard 1 , Peter C. Webb 2
Affiliation  

The study of Te, As, Bi, Sb and Se (TABS) has increased over the past years due to their use in the development of low‐carbon energy technologies. However, there is a scarcity of mass fraction values of TABS in geological reference materials. This underlines the difficulty in undertaking routine determinations of these elements. The mass fractions of TABS were determined in geological reference materials using hydride generation‐atomic fluorescence spectrometry (HG‐AFS), calibrated with standard solutions. Comparisons with literature values were used to validate the method. Samples from the GeoPT proficiency test were also analysed. For most elements, there are no assigned or even provisional values for many of the GeoPT and reference materials because of the wide range of results reported. For mass fractions above the quantification limit of the method, our results are in good agreement with the median of GeoPT results. Thus, we propose GeoPT median values as informational values for these elements. In contrast, at mass fractions < 0.5 µg g−1 median values of Se from GeoPT are systematically higher than our results. Our Se results are in agreement with the reference materials down to 0.02 µg g−1, which suggest that many of the results for Se reported in GeoPT testing are too high.

中文翻译:

氢化物发生原子荧光光谱法(HG-AFS)测定地质参考材料和GeoPT能力验证材料中的Te,As,Bi,Sb和Se(TABS)

近年来,由于Te,As,Bi,Sb和Se(TABS)用于低碳能源技术的发展,对它们的研究有所增加。然而,在地质参考材料中缺乏TABS的质量分数值。这强调了对这些元素进行常规测定的困难。使用标准溶液校准的氢化物发生原子荧光光谱法(HG-AFS)在地质参考材料中确定TABS的质量分数。与文献值的比较被用来验证该方法。还分析了Geo PT能力测试的样本。对于大多数元素,许多Geo PT都没有分配的值甚至没有临时值和参考材料,因为报道了广泛的结果。对于质量分数超出方法定量极限的情况,我们的结果与Geo PT结果的中位数非常吻合。因此,我们提出了Geo PT中值作为这些元素的信息值。相反,在质量分数<0.5 µg g -1时,Geo PT的Se的中值系统地高于我们的结果。我们的Se结果与低至0.02 µg g -1的标准物质相符,这表明Geo PT测试报告的许多硒结果都过高。
更新日期:2019-09-20
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