The comparability of the determination of the molar mass of silicon highly enriched in 28Si: Results of the CCQM-P160 interlaboratory comparison and additional external measurements.

Rienitz, Olaf; Pramann, Axel; Vogl, Jochen; Lee, Kyoung-Seok; Yim, Yong-Hyeon; Malinovskiy, Dmitriy; Hill, Sarah; Dunn, Philip; Goenaga-Infante, Heidi; Ren, Tongxiang; Wang, Jun; Vocke Jr., Robert D.; Rabb, Savelas A.; Narukawa, Tomohiro; Yang, Lu; Mester, Zoltan; Meija, Juris; Aref’ev, Dmitri G.; Marchin, Vladimir; Sharin, Alexander G.; Bulanov, Andrei D.; Potapov, Alexander M.; Otopkova, Polina A.; Kessel, Rüdiger

doi:https://doi.org/10.1088/1681-7575/abbdbf

Zugriffsnummer	45189
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	The comparability of the determination of the molar mass of silicon highly enriched in 28Si: Results of the CCQM-P160 interlaboratory comparison and additional external measurements.
Autor(in); Institution	Rienitz, Olaf; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig Pramann, Axel; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig Vogl, Jochen; Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, GERMANY Lee, Kyoung-Seok; Korea Research Institute of Standards and Science (KRISS), Daejeon, REPUBLIC OF KOREA Yim, Yong-Hyeon; Korea Research Institute of Standards and Science (KRISS), Daejeon, REPUBLIC OF KOREA Malinovskiy, Dmitriy; LGC Limited, Teddington, UK Hill, Sarah; LGC Limited, Teddington, UK Dunn, Philip; LGC Limited, Teddington, UK Goenaga-Infante, Heidi; LGC Limited, Teddington, UK Ren, Tongxiang; National Institute of Metrology (NIM), Beijing, CHINA Wang, Jun; National Institute of Metrology (NIM), Beijing, CHINA Vocke Jr., Robert D.; National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA Rabb, Savelas A.; National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA Narukawa, Tomohiro; National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, JAPAN Yang, Lu; National Research Council Canada (NRC), Ottawa, CANADA Mester, Zoltan; National Research Council Canada (NRC), Ottawa, Ontario, CANADA Meija, Juris; National Research Council Canada (NRC), Ottawa, CANADA Aref’ev, Dmitri G.; JSC PA 'Electrochemical plant' (ECP), Zelenogorsk, RUSSIA Marchin, Vladimir; JSC PA 'Electrochemical plant' (ECP), Zelenogorsk, RUSSIA Sharin, Alexander G.; JSC PA 'Electrochemical plant' (ECP), Zelenogorsk, RUSSIA Bulanov, Andrei D.; G. G. Devyatych Institute of Chemistry of High Purity Substances (IChHPS), Russian Academy of Sciences (RAS), Nizhny Novgorod, RUSSIA Potapov, Alexander M.; G. G. Devyatych Institute of Chemistry of High Purity Substances (IChHPS), Russian Academy of Sciences (RAS), Nizhny Novgorod, RUSSIA Otopkova, Polina A.; G. G. Devyatych Institute of Chemistry of High Purity Substances (IChHPS), Russian Academy of Sciences (RAS), Nizhny Novgorod, RUSSIA Kessel, Rüdiger; Metrodata Datenverarbeitung für Messtechnik und Qualitätssicherung GmbH, Braunschweig, GERMANY
Quelle/Jahr	Metrologia: 57 (2020), 6, 1 - 13
Artikelnummer	065028
ISSN	0026-1394 (PRINT) ; 1681-7575 (ONLINE)
DOI	https://doi.org/10.1088/1681-7575/abbdbf
Verlag	Bristol: IOP Publishing
Freie Schlagworte	silicon ; molar mass ; CCQM-P160 ; IAWG ; IRWG ; revision of the SI
Zusammenfassung	An international comparison study on the accurate determination of the molar mass M(Si) of silicon artificially enriched in ²⁸Si (x(²⁸Si) > 0.9999 mol mol^-1) has been completed. The measurements were part of the high level CCQM-P160 pilot study assessing the ability of National Metrology Institutes (NMIs) and Designated Institutes (DIs) to make such measurements at the lowest possible levels of measurement uncertainty and to identify possible difficulties when measuring this kind of sample. This study supports the molar mass measurements critical to disseminating the silicon route to realizing the new definitions for the kilogram and the mole. Measurements were also made by one external research institute and an external company. The different institutes were free to choose their experimental (mass spectrometric) set-ups and equipment, thereby enabling also the comparison of different techniques. The investigated material was a chemically pure, polycrystalline silicon material. The subsequent modified single crystalline secondary product of this material was intended for the production of silicon which was used for two additional spheres in the context of the redetermination of the Avogadro constant N_A, required for the revision of the International System of Units (SI) via fundamental constants which came into force from May 2019. The CCQM pilot study was organized by Physikalisch-Technische Bundesanstalt (PTB). Aqueous silicon solutions were shipped to all participating institutions. The data analysis as well as the uncertainty modelling and calculation of the results was predefined. The participants were provided with an uncertainty budget as a GUM Workbench® file as well as a free software license for the duration of the comparison. The agreement of the values of the molar mass (M(Si) = 27.976 942 577 g mol^-1) was excellent with ten out of 11 results reported within the range of relative uncertainty of 1 × 10^-8 required for the revision of the SI.

Themenbereich der Metrologie

Metrologie in der Chemie und Stoffeigenschaften

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Rienitz, O., Pramann, A., Vogl, J., Lee, K.-S., Yim, Y.-H., Malinovskiy, D., Hill, S., Dunn, P., Goenaga-Infante, H., Ren, T., Wang, J., Vocke Jr., R. D., Rabb, S. A., Narukawa, T., Yang, L., Mester, Z., Meija, J., Aref’ev, D. G., Marchin, V., Sharin, A. G., Bulanov, A. D., Potapov, A. M., Otopkova, P. A., & Kessel, R. (2020). The comparability of the determination of the molar mass of silicon highly enriched in 28Si: Results of the CCQM-P160 interlaboratory comparison and additional external measurements. Metrologia, 57(6), 1–13. https://doi.org/10.1088/1681-7575/abbdbf

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