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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)

Mansur Eduardo T., Barnes Sarah-Jane, Savard Dany et Webb Peter C.. (2019). 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,

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URL officielle: https://doi.org/10.1111/ggr.12289

Résumé

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.

Type de document:Article publié dans une revue avec comité d'évaluation
Version évaluée par les pairs:Oui
Date:2019
Sujets:Sciences naturelles et génie > Sciences appliquées
Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Unité d'enseignement en sciences de la Terre
Mots-clés:Te, As, Bi, Sb, Se, HG-AFS, geological reference materials, GeoPT
Déposé le:04 sept. 2019 21:33
Dernière modification:08 juill. 2020 04:10
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