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KEY COMPARISON

International comparison CCQM K23b: Natural gas type II

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Published under licence by IOP Publishing Ltd
, , Citation Adriaan M H van der Veen et al 2010 Metrologia 47 08013 DOI 10.1088/0026-1394/47/1A/08013

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1 NMi Van Swinden Laboratorium B.V. (NMi VSL), Thijsseweg 11, 2629 JA Delft, the Netherlands

2 National Measurement Institute, Australia (NMIA), Bradfield Road, West Lindfield, NSW 2070, Australia

3 Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (INMETRO), Rua Nossa Senhora das Graças, 50, Prédio 4, Xerém RJ, CEP 25250-020, Brazil

4 National Institute of Metrology (NIM), Beijing Beisanhuan Donglu No. 18, Beijng 100013, People's Republic of China

5 Bundesanstalt für Materialforschung und -prüfung (BAM), Abteilung I, Unter den Eichen 87, D-12205 Berlin, Germany

6 Ceský metrologický institut (CMI), Brno, Okruzni 31, Post Code 638 00, Czech Republic

7 Centro Español de Metrologia (CEM), C/ del Alfar, 2, 28760 Tres Cantos (Madrid), Spain

8 National Metrology Insitute of Japan (NMIJ), Tsukuba Central 3, Tsukuba 305-8563, Japan

9 National Office of Measures (OMH), Chemistry Section, Nemetvolgyi ut 37, Budapest, Hungary

10 Korea Research Institute of Standards and Science (KRISS), Division of Chemical Metrology and Materials Evaluation, PO Box 102, Yusong, Taejon, Korea

11 CENAM, Km. 4,5 Carretera a los Cues, Municipio del Marques CP 76900, Queretaro, Mexico

12 Central Office of Measures, Physical Chemistry Division (GUM), 2 Elektoralna St., 00-950 Warsaw, Poland

13 Instituto Português da Qualidade, Rua António Gião 2, 2829-513 Caparica, Portugal

14 D I Mendeleyev Institute for Metrology (VNIIM), Department of Physical Chemical Measurements, 19, Moskovsky Prospekt, 198005 St Petersburg, Russia

15 Slovak Institute of Metrology (SMU), Karloveská 63, 742 55 Bratislava, Slovak Republic

16 National Physical Laboratory (NPL), Teddington, Middlesex, TW11 0LW, UK

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0026-1394/47/1A/08013

Abstract

At the highest metrological level, natural gas standards are commonly prepared gravimetrically as PSMs (Primary Standard Mixtures). This international key comparison is a repeat of CCQM-K1e-g. The mixtures concerned contain nitrogen, carbon dioxide and the alkanes up to butane. The only difference from CCQM-K1e-g is the addition of iso-butane to the list. The agreement of the results in this key comparison is very good. For all parameters, with a few exceptions, the results agree within 0.5% (or better) with the key comparison reference value. For methane, the results are generally within 0.1% (or better) of the KCRV.

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).

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10.1088/0026-1394/47/1A/08013