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Final Report on International comparison CCQM K23ac: Natural gas types I and III

2006; IOP Publishing; Volume: 44; Issue: 1A Linguagem: Inglês

10.1088/0026-1394/44/1a/08001

1681-7575

Adriaan M. H. van der Veen, Paul R Ziel, E. W. B. de Leer, Damian Smeulders, Laurie Besley, Valnei S. Cunha, Zei Zhou, Qiao Han, Hans-Joachim Heine, Jan Tichý, Teresa Lopez Esteban, Tatiana Macé, Zsófia Nagyné Szilágyi, Jin-Chun Woo, Hyun-Kil Bae, Alejandro Pérez Castorena, Melina Pérez Urquiza, Francisco Rangel Murillo, Víctor M Serrano Caballero, Carlos E Carbajal Alarcón, Carlos Ramírez Nambo, Manuel de Jesús Avila Salas, Agata Rakowska, Florbela A. Dias, L A Konopelko, T. A. Popova, В.В. Панкратов, M A Kovrizhnih, А В Мешков, O V Efremova, Y A Kustikov, Stanislav Musil, Frantisek Chromek, Miroslava Valková, Martin Milton,

Chemical and Environmental Engineering Research

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 with CCQM-K1e-g is the addition of iso-butane to the list. The results usually agree within 1% (or better) with the key comparison reference value. For ethane, nitrogen and carbon dioxide, the agreement is within 0.5% (or better), and for methane 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).