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

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DOIResolve DOI: http://doi.org/10.1021/ac201795v
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TypeArticle
Journal titleAnalytical Chemistry
ISSN0003-2700
Volume83
Issue23
Pages89999004; # of pages: 6
SubjectCorrection 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
AbstractMulticollector 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.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for National Measurement Standards
Peer reviewedYes
NPARC number21271336
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Record identifierc7ef21e5-9431-48e8-9526-9a237021b263
Record created2014-03-24
Record modified2016-05-09
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