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Brown AS, van der Veen AM, Arrhenius K, et al. Traceable reference gas mixtures for sulfur-free natural gas odorants. Anal Chem. 2014;86(13):6695-702doi: 10.1021/ac501525d.
Brown, A. S., van der Veen, A. M., Arrhenius, K., Downey, M. L., Kühnemuth, D., Li, J., Ent, H., & Culleton, L. P. (2014). Traceable reference gas mixtures for sulfur-free natural gas odorants. Analytical chemistry, 86(13), 6695-702. https://doi.org/10.1021/ac501525d
Brown, Andrew S, et al. "Traceable reference gas mixtures for sulfur-free natural gas odorants." Analytical chemistry vol. 86,13 (2014): 6695-702. doi: https://doi.org/10.1021/ac501525d
Brown AS, van der Veen AM, Arrhenius K, Downey ML, Kühnemuth D, Li J, Ent H, Culleton LP. Traceable reference gas mixtures for sulfur-free natural gas odorants. Anal Chem. 2014 Jul 01;86(13):6695-702. doi: 10.1021/ac501525d. Epub 2014 Jun 18. PMID: 24882216.
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Anal Chem. 2014 Jul 01;86(13):6695-702. doi: 10.1021/ac501525d. Epub 2014 Jun 18.

Traceable reference gas mixtures for sulfur-free natural gas odorants.

Analytical chemistry

Andrew S Brown, Adriaan M H van der Veen, Karine Arrhenius, Michael L Downey, Daniel Kühnemuth, Jianrong Li, Hugo Ent, Lucy P Culleton

Affiliations

  1. Analytical Science Division, National Physical Laboratory , Teddington, Middlesex TW11 0LW, United Kingdom.

PMID: 24882216 DOI: 10.1021/ac501525d

Abstract

The first reference gas mixtures of sulfur-free natural gas odorants that are traceable to the International System of Units (SI) have been produced and their compositions validated. These mixtures, which contain methyl acrylate and ethyl acrylate at amount fractions between 1.1 and 2.1 μmol mol(-1), can be used to underpin measurements of sulfur-free odorants, which are increasingly being used to odorize natural gas in transmission networks as they have less harmful properties than traditional sulfur-containing odorants. The reference gas mixtures produced have been shown to be stable in passivated aluminum cylinders for at least 8 months and have been validated (to within 6% or less) by interlaboratory measurements at three National Measurement Institutes. The stability of methyl acrylate and ethyl acrylate in gas sampling bags has been investigated, and the challenges of analyzing 2-ethyl-3-methylpyrazine, which is used as a stabilizer in sulfur-free odorants, are also briefly discussed.

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