| Téléchargement | - Voir la version finale : Determination of the isotopic composition of iridium using Multicollector-ICPMS (PDF, 762 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/acs.analchem.7b02206 |
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| Auteur | Rechercher : Zhu, Zuhao1; Rechercher : Meija, Juris1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535; Rechercher : Zhang, Airong; Rechercher : Mester, Zoltán1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615; Rechercher : Yang, Lu1Identifiant ORCID : https://orcid.org/0000-0002-6896-8603 |
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| Affiliation | - Conseil national de recherches du Canada. Science des mesures et étalons
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| Format | Texte, Article |
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| Résumé | Like many other elements, iridium is lacking a calibrated, SI traceable isotope ratio measurement. In this study we have undertaken absolute isotope amount ratio measurements of iridium by MC-ICPMS using a state-of-the-art regression model to correct for the instrumental fractionation (mass bias) of isotope ratios using both NIST SRM 997 isotopic thallium and NIST SRM 989 isotopic rhenium as primary calibrators. The optimized regression mass bias correction model is based on incrementally increasing plasma power and short (10–30 min) measurement sessions. This experimental design allows fast implementation of the regression method which would normally require hours-long measurement sessions when executed under constant plasma power. Measurements of four commercial iridium materials provide a calibrated iridium isotope ratio R193/191 = 1.6866(6)k=1 which corresponds to isotopic abundance x191 = 0.372 21(8)k=1 and an atomic weight of Ar(Ir) = 192.217 63(17)k=1. In addition, we present data on a new Certified Reference Material from NRC Canada IRIS-1 which fulfills the requirements of a delta zero reference for iridium isotope ratio measurements. |
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| Date de publication | 2017-08-07 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 23002147 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 14795136-ff02-467c-a03c-c069ff863d9d |
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| Enregistrement créé | 2017-08-25 |
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| Enregistrement modifié | 2024-08-12 |
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