• Treffer 3 von 3
Zurück zur Trefferliste

International comparison CCQM-K66: Impurity analysis of methane

  • This key comparison was performed to demonstrate the capability of NMIs to analyse the purity of methane for use as a source gas in the preparation of standard gas mixtures. This capability is an essential requirement for the preparation of accurate standards of natural gas and some other fuels. Since it is difficult to carry out a comparison with individual samples of pure gas, the sample for this comparison was a synthetic mixture of high purity methane with selected added impurities of nitrogen, argon, carbon dioxide and ethane. These mixtures were prepared by a gas company as a batch of 10 cylinders and their homogeneity and stability were evaluated by NMIJ. The KCRVs for the four different analytes in this key comparison are based on a consensus of values reported by participants. The uncertainties in the degrees of equivalence were calculated by combining the reported uncertainties with the homogeneity of the samples and the uncertainty of the KCRV. The results submitted areThis key comparison was performed to demonstrate the capability of NMIs to analyse the purity of methane for use as a source gas in the preparation of standard gas mixtures. This capability is an essential requirement for the preparation of accurate standards of natural gas and some other fuels. Since it is difficult to carry out a comparison with individual samples of pure gas, the sample for this comparison was a synthetic mixture of high purity methane with selected added impurities of nitrogen, argon, carbon dioxide and ethane. These mixtures were prepared by a gas company as a batch of 10 cylinders and their homogeneity and stability were evaluated by NMIJ. The KCRVs for the four different analytes in this key comparison are based on a consensus of values reported by participants. The uncertainties in the degrees of equivalence were calculated by combining the reported uncertainties with the homogeneity of the samples and the uncertainty of the KCRV. The results submitted are generally consistent with the KCRV within the estimated uncertainties. Finally, this comparison demonstrates that the analysis of nitrogen, argon, carbon dioxide and ethane in methane at amount fractions of 1 µmol/mol to 5 µmol/mol is generally possible with an uncertainty of 5% to 10%. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA). DatesIssue 1A (Technical Supplement 2012)zeige mehrzeige weniger

Metadaten exportieren

Weitere Dienste

Teilen auf Twitter Suche bei Google Scholar Anzahl der Zugriffe auf dieses Dokument
Metadaten
Autor*innen:K. Kato, T. Watanabe, Hans-Joachim Heine, Claudia Boissière, Gert Schulz, J.-C. Woo, J.S. Kim, O. Sang-Hyub, H. K. Bae, Y.D. Kim, H. Qiao, F.R. Guenther, G. C. Roderick, W. Miller, D. Smeulders, A. Botha, M.J. van Rensburg, J. Tshilongo, N. Leshabane, N. Ntsasa, M. Milton, G. Vargha, A. Harling, L. Konopelko, Y.A. Kustikov, I.I. Vasserman, S. V. Zavyalov, T.A. Popova, V.V. Pankratov, M.N. Pir, M.A. Maltsev, R. Oudwater, S. Persijn, J. van Wijk, R. M. Wessel
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Metrologia
Jahr der Erstveröffentlichung:2012
Verlag:Inst. of Physics Publ.
Verlagsort:Bristol
Jahrgang/Band:49
Ausgabe/Heft:08001
Erste Seite:1
Letzte Seite:76
Freie Schlagwörter:Gaschromatographie; Methan; Ringversuch; Spurenverunreinigungen
DOI:10.1088/0026-1394/49/1A/08001
ISSN:0026-1394
ISSN:1681-7575
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:31.05.2012
Einverstanden
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.