Uncertainty assessment of Si molar mass measurements

Mana, Giovanni; Massa, Enrico; Valkiers, S.; Willenberg, G.-D.

doi:10.1016/j.ijms.2009.09.005

Cited by 12 publications

(21 citation statements)

References 13 publications

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“…The equation for this particular calibration design is equivalent to that given recently by Mana et al [16]. Eq.…”

Section: More Isotope Mixturesmentioning

confidence: 99%

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Calibration of isotope amount ratios by analysis of isotope mixtures

Meija

2012

Anal Bioanal Chem

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=5b75dff8-00e4-4f2b-bacf-77fa70767efd http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=5b75dff8-00e4-4f2b-bacf-77fa70767efdCalibration of isotope amount ratios by analysis of isotope mixtures Juris MeijaMeasurement Science and Standards, National Research Council Canada, 1200 Montreal Road, Ottawa ON K1A 0R6, Canada E-mail: juris.meija@nrc-cnrc.gc.caAbstract. The question as to what constitutes a fully calibrated isotope amount ratio measurement still remains a topic of active research. For years, the definitive calibration approach has been by means of synthetic mixtures of highly enriched isotopes with known chemical purity to give gravimetrically defined ratios. This article outlines the core concepts and assumptions of this method and illustrates the recent developments in the practical metrology of isotope amount ratio measurements.

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“…The equation for this particular calibration design is equivalent to that given recently by Mana et al [16]. Eq.…”

Section: More Isotope Mixturesmentioning

confidence: 99%

“…(11) (or Eq. (10)) was only presented recently [16], it can be derived by direct inversion of the traditional isotope dilution equation,…”

Section: Calibrationmentioning

confidence: 99%

Calibration of isotope amount ratios by analysis of isotope mixtures

Meija

2012

Anal Bioanal Chem

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“…Eventually, a 5 kg 28 Si crystal was grown and purified by the Leibniz-Institut für Kristallzüchtung (Berlin, Germany). Since, in an enriched 28 Si crystal, the minority isotopes contribute to the molar mass only through very small corrective terms, measurements of the minority isotope fractions having a 10 −2 relative uncertainty are sufficient [16]. Accurate molar mass measurements were thus possible by using a combination of isotope dilution mass spectrometry and high resolution inductively coupled plasma mass spectrometry [17,18].…”

Section: Molar Massmentioning

confidence: 99%

Accurate measurements of the Avogadro and Planck constants by counting silicon atoms

Bettin

Fujii²,

Man

et al. 2013

Annalen der Physik

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Fundamental constants link seemingly different fields of physics and seemingly different quantities and measurement units. Consequently, they are of the utmost interest in metrology and it has been planned to redefine the kilogram by fixing the numerical value of the Planck constant. This paper summarises the methods to measure the ratio between the Planck constant and a mass and reviews the determination of the Avogadro constant by counting the atoms in a silicon crystal highly enriched by the Si-28 isotope

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“…As for the two-isotope system [21], the determination of the calibration factors requires blending weighed amounts of Si with different isotopic compositions and measuring the isotope amount ratios in the blend and parent materials. The usual way to determine Ä 29 and Ä 30 is by comparing the measured and expected ratios -r i and R i , respectively -in the synthetic mixture; in a formula, Ä i = R i /r i .…”

Section: Calibration Of Mass Spectrometric Measurementsmentioning

confidence: 99%

“…In a previous paper [21] the issues of measurement uncertainty and calibration in a two-isotope system were addressed; here the results are extended to the real three-isotope system. For the very first time, the calibration factors are given explicitly by means of exact formulae; accordingly, they are straightforwardly calculated in one step from the measured ratios.…”

Section: Introductionmentioning

confidence: 99%