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Observations of large mass-independent fractionation occurring in MC-ICPMS: Implications for determination of accurate isotope amount ratios

Par Conseil national de recherches du Canada

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DOITrouver le DOI : https://doi.org/10.1021/ac201795v
AuteurRechercher : 1; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615; Rechercher : ; Rechercher : ; Rechercher : 1; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535
Affiliation
  1. Conseil national de recherches du Canada. Institut des étalons nationaux de mesure du CNRC
FormatTexte, Article
Sujetcorrection models; discrimination model; exponential models; isotope amount ratio; isotope amount ratio measurements; isotopic fractionations; mass-independent fractionation; MC-ICP-MS; multi-collector inductively coupled plasma mass spectrometry; standard curriculum; curricula; germanium; inductively coupled plasma; inductively coupled plasma mass spectrometry; isotopes; mass spectrometers
Résumé
Multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) suffers large bias in isotope amount ratio determinations which has to be properly accounted for. The choice of the proper discrimination model is crucial. Over the last few decades, the exponential mass-bias correction model (Russell's law) has become a standard curriculum in isotope amount ratio measurements. In nature, however, isotopic fractionation that deviates significantly from the exponential model has been known for a long time. Recently, such fractionation was also observed in MC-ICPMS. This phenomenon is termed mass-independent fractionation. In this study, significant departure from the mass-dependent fractionation model is reported for germanium and lead with the most dramatic occurring for germanium-73 and lead-204 isotopes wherein, on average, close to a half percent bias was evidenced from the Russell's law. © 2011 American Chemical Society.
Date de publication
Dans
  • Analytical Chemistry 83, nº 23 : 8999–9004.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21271336
Exporter la noticeExporter en format RIS
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Identificateur de l’enregistrementc7ef21e5-9431-48e8-9526-9a237021b263
Enregistrement créé2014-03-24
Enregistrement modifié2020-06-04
Date de modification :