Preparation of Synthetic Isotope Mixtures for the calibration of carbon and oxygen isotope ratio measurements (in carbon dioxide) to the SI

Valkiers, S.; Varlam, M.; Ruße, K.; Berglund, Michael; Taylor, Philip; Wang, J.; Milton, Martin; Bièvre, Paul De

doi:10.1016/j.ijms.2007.03.012

Cited by 33 publications

(37 citation statements)

References 21 publications

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“…The '+' indicates a lower concentration of impurities, mainly hydrocarbons [19] Table 1 shows a summary of the isotopic composition as measured at IRMM using a specially constructed isotope ratio mass spectrometer [20][21][22][23][24][25]. Surprisingly, the molar mass was higher by 3.77(21) parts in 10 6 for the argon used in the hung isotherm.…”

Section: Argon Isotopic Analysis and Chemical Puritymentioning

confidence: 99%

Acoustic Resonator Experiments at the Triple Point of Water: First Results for the Boltzmann Constant and Remaining Challenges

et al. 2010

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We report on two sets of isothermal acoustic measurements made with argon close to the triple point of water using a 50 mm radius, thin-walled, diamondturned quasisphere. Our two isotherms yielded values for the Boltzmann constant, k B , which differ by 0.9 parts in 10 6 , and have an average value of k B = (1.380 649 6 ± 0.000 004 3) × 10 −23 J · K −1 . The relative uncertainty is 3.1 parts in 10 6 , and the average value is 0.58 parts in 10 6 below the 2006 CODATA value (Mohr et al. Rev Mod Phys 80:633, 2008), and so the values are consistent within their combined (k = 1) uncertainties.

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Section: Argon Isotopic Analysis and Chemical Puritymentioning

confidence: 99%

Acoustic Resonator Experiments at the Triple Point of Water: First Results for the Boltzmann Constant and Remaining Challenges

et al. 2010

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“…This limitation is due to the analysis of only the molecular isotopologue ratios 45 R and 46 R. In principle, a third molecular isotopologue ratio ( 47 R, 48 R or 49 R) could provide the required information, but implementing this approach is difficult due to the low abundance of the heavier isotopologues (Table 1) and the lower precision of their analysis. Nevertheless, a recent absolute calibration of isotope ratios in CO 2 followed just this approach (Valkiers et al, 2007a).…”

Section: Mass-dependent Fractionationmentioning

confidence: 99%

Reformulated 17O correction of mass spectrometric stable isotope measurements in carbon dioxide and a critical appraisal of historic ‘absolute’ carbon and oxygen isotope ratios

Kaiser

2008

Geochimica et Cosmochimica Acta

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“…In practice, however, simplifications are introduced to obtain the gravimetrically defined isotope amount ratios. Using silicon as an example, this is akin to obtaining the gravimetrically defined ratio n( 28 Si)/n( 29 Si) from the isotopic analyses of 28 Si and 29 Si and their blend 28 Si plus 29 Si. For this simplified approach to work, further concessions are required for the calibration factors of the disregarded 30 Si isotope ratio.…”

Section: Extension To More Isotopesmentioning

confidence: 99%

“…Therefore, determination of the carbon isotope amount ratio n( 13 C)/n( 12 C) with this method involves the isotopic composition of oxygen. Measurements of three isotope amount ratios (corresponding to mass numbers 45/44, 46/44, and 47/44) in two isotopically distinct materials of CO 2 in addition to measurements of these isotope ratios in a mixture of these two materials is sufficient to yield the calibrated isotopic composition of carbon and oxygen [28]. The difficulty that arises when the isotope mixture deconvolution model is applied to molecular systems is the polynomial conversion between the isotope amount ratios of atoms and isotopologues.…”

Section: Extension To Molecular Mass Spectrometrymentioning

confidence: 99%

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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Preparation of Synthetic Isotope Mixtures for the calibration of carbon and oxygen isotope ratio measurements (in carbon dioxide) to the SI

Cited by 33 publications

References 21 publications

Acoustic Resonator Experiments at the Triple Point of Water: First Results for the Boltzmann Constant and Remaining Challenges

Acoustic Resonator Experiments at the Triple Point of Water: First Results for the Boltzmann Constant and Remaining Challenges

Reformulated 17O correction of mass spectrometric stable isotope measurements in carbon dioxide and a critical appraisal of historic ‘absolute’ carbon and oxygen isotope ratios

Calibration of isotope amount ratios by analysis of isotope mixtures

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