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J Chromatogr A. 2015 Feb 27;1383:144-50. doi: 10.1016/j.chroma.2015.01.030. Epub 2015 Jan 16.

An investigation of the matrix sensitivity of refinery gas analysis using gas chromatography with flame ionisation detection.

Author information

1
National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom. Electronic address: valerio.ferracci@npl.co.uk.
2
National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom.

Abstract

The response of a flame ionisation detector (FID) on a gas chromatograph to methane, ethane, propane, i-butane and n-butane in a series of multi-component refinery gas standards was investigated to assess the matrix sensitivity of the instrument. High-accuracy synthetic gas standards, traceable to the International System of Units, were used to minimise uncertainties. The instrument response exhibited a small dependence on the component amount fraction: this behaviour, consistent with that of another FID, was thoroughly characterised over a wide range of component amount fractions and was shown to introduce a negligible bias in the analysis of refinery gas samples, provided a suitable reference standard is employed. No significant effects of the molar volume, density and viscosity of the gas mixtures on the instrument response were observed, indicating that the FID is suitable for the analysis of refinery gas mixtures over a wide range of component amount fractions provided that appropriate drift-correction procedures are employed.

KEYWORDS:

Detector linearity; Energy gases; GC-FID; Gas analysis; Gas standards; Refinery gas

PMID:
25620742
DOI:
10.1016/j.chroma.2015.01.030
[Indexed for MEDLINE]

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