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Total sulfur concentration in geological reference materials by elemental infrared analyser

Bédard L. Paul, Savard Dany et Barnes Sarah-Jane. (2008). Total sulfur concentration in geological reference materials by elemental infrared analyser. Geostandards and Geoanalytical Research, 32, (2), p. 203-208.

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Résumé

Total sulfur is an analyte for which there are few determinations published, despite the fact that it is a very important element (e.g., a major element in most ores, an important gas constituent in global warming, an active participant in acid drainage). Most geological reference materials have very poor quality sulfur results, that is with relative standard deviations (RSD) in the range of 30–50%, even for concentrations over 100 μg g−1 S, which compromises their use as calibrators. In order to provide modern results with low RSD, sulfur was determined in twenty-nine geological reference materials with a state-of-the-art elemental S/C analyser using metal chips (certified reference materials with a traceability link) and analytical grade sulfur for high concentration samples. Analytical parameters (sample mass, crucible degassing, calibration strategy, etc.) were optimised by testing. Our results agreed with reference material values provided by issuing bodies. Results for CCRMP SY-2 (129 ± 13 μg g−1 S), which has been proposed as a sulfur reference material, were in agreement with the proposed modern value of 122 ± 3.7 μg g−1 S.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:1751-908X
Volume:32
Numéro:2
Pages:p. 203-208
Version évaluée par les pairs:Oui
Date:2008
Sujets: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:sulfur, infrared analyser, reference materials, CCRMP SY-2
Déposé le:02 mai 2016 20:37
Dernière modification:09 déc. 2016 14:13
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