| Zugriffsnummer | 42407 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Amount of substance and the mole in the SI |
| Autor(in); Institution |
Güttler, Bernd; 3, Chemische Physik und Explosionsschutz, PTB-Braunschweig
Bettin, Horst; 1.8, Masse - Darstellung der Einheit, PTB-Braunschweig
Brown, Richard J. C.; National Physical Laboratory (NPL), Teddington, UK
Davis, Richard S.; Bureau International des Poids et Mesures (BIPM), Sèvres CEDEX, FRANCE
Mester, Zoltan; National Research Council Canada (NRC), Ottawa, CANADA
Milton, Martin J. T.; Bureau International des Poids et Mesures (BIPM), Sèvres CEDEX, FRANCE
Pramann, Axel; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig
Rienitz, Olaf; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig
Vocke, Robert D.; National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA
Wielgosz, Robert I.; Bureau International des Poids et Mesures (BIPM), Sèvres CEDEX, FRANCE
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| Quelle/Jahr | Metrologia: 56 (2019), 4, 1 - 14 |
| Artikelnummer | 044002 |
| ISSN | 0026-1394 (PRINT) ; 1681-7575 (ONLINE) |
| DOI | |
| Verlag | Bristol: IOP Publishing |
| Freie Schlagworte | mole ; amount of substance ; Avogadro constant ; Avogadro project ; International System of Units ; silicon |
| Zusammenfassung | Following the revision of the International System of Units (SI), that took effect on 20 May 2019, the unit mole is defined by using a fixed number of elementary entities. This number is the fixed numerical value of the Avogadro constant, which is the defining constant of the unit mole. This definition was made possible because the determination of the Avogadro constant had reached a level of relative uncertainty that allowed its value to be fixed and, at the same time, safeguard continuity of measurement results before and after the definition. The motivation for the definition of the SI and the mole in particular will be explained and the experimental work that allowed it will be summarized. |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY 3.0 ; Creative Commons Attribution 3.0 License |
| Themenbereich der Metrologie | Metrologie in der Chemie und Stoffeigenschaften |