Determination of the Atomic Weight of ²⁸Si-Enriched Silicon for a Revised Estimate of the Avogadro Constant

Abstract

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Determination of the atomic weight of ²⁸Si-enriched silicon for a revised estimate of the Avogadro Constant Yang, Lu; Mester, Zoltán; Sturgeon, Ralph E.; Meija, Juris http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21268853&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21268853&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en 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.http://doi.org/10.1021/ac203006jAnalytical Chemistry, 84, 5, pp. 2321-2327, 2012-03-06 Determination of the Atomic Weight of 28 Si-Enriched Silicon for a Revised Estimate of the Avogadro Constant Lu Yang, Zoltań Mester,* Ralph E. Sturgeon, and Juris Meija Institute for National Measurement Standards, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada * S Supporting Information ABSTRACT: The much anticipated overhaul of the International System of Units (SI) will result in new definitions of base units in terms of fundamental constants. However, redefinition of the kilogram in terms of the Planck constant (h) cannot proceed without consistency between the Avogadro and Planck constants, which are both related through the Rydberg constant. In this work, an independent assessment of the atomic weight of silicon in a highly enriched 28 Si crystal supplied by the International Avogadro Coordination (IAC) was performed. This recent analytical approach, based on dissolution with NaOH and its isotopic characterization by multicollector inductively coupled plasma mass spectrometry, is critically evaluated. The resulta...

Improved measurement results for the Avogadro constant using a28Si-enriched crystal

“…The NRC had also postulated that the PTB samples (and by implication, the NMIJ and NIST samples) had undergone direct contamination by natural silicon [14]. This possibility was ruled out when the absolute mass fraction of silicon in the NaOH material used for the PTB analyses was found to be a factor of ten lower than the concentration necessary to explain the PTB-NRC molar mass differences.…”

Reduction of measurement uncertainty by experimental design in high-order (double, triple, and quadruple) isotope dilution mass spectrometry: application to GC-MS measurement of bromide

“…Rather, only mixtures are measured. Such a strategy was also followed in the recent Avogadro project, where atomic weight of the highly-enriched silicon-28 was established without the direct measurement of the silicon-28 isotope [11][12][13]. …”

The Avogadro Constant for the Definition and Realization of the Mole

“…[74][75][76][77] Currently, a CCQM-pilot study is pending aiming at the screening of the ability of the participants of the study to measure the molar mass M of highly enriched silicon with sufficiently small associated uncertainties applying the VE-IDMS method. [74][75][76][77] Currently, a CCQM-pilot study is pending aiming at the screening of the ability of the participants of the study to measure the molar mass M of highly enriched silicon with sufficiently small associated uncertainties applying the VE-IDMS method.…”