Determination of aromatic hydrocarbons in gasolines by flow modulated comprehensive two-dimensional gas chromatography

• Published in: Journal of Chromatography A Vol. 1080; no. 2; pp. 157 - 165
• Main Authors: Diehl, John W., Di Sanzo, Frank P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 08.07.2005; Elsevier
• Subjects: Analytical chemistry; Applied sciences; Calibration; Chemistry; Chromatographic methods and physical methods associated with chromatography; Chromatography, Gas - instrumentation; Chromatography, Gas - methods; Comprehensive two-dimensional; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; Flame Ionization - methods; Fuels; Gas chromatographic methods; Gas chromatography; Gasoline - analysis; Gasolines; Hydrocarbons aromatic; Hydrocarbons, Aromatic - analysis; Prospecting and production of crude oil, natural gas, oil shales and tar sands; Reproducibility of Results; Gas chromatography; Comprehensive two-dimensional; Hydrocarbons aromatic; Gasolines; Chemical analysis; Two dimensional chromatography; Hydrocarbon; Benzene derivatives; Flame ionization detector; Condensed benzenic compound; Naphthalene derivatives; Gasoline; Quantitative analysis
• ISSN: 0021-9673
• DOI: 10.1016/j.chroma.2004.11.054

Valve based/flow modulated comprehensive two-dimensional gas chromatography–flame ionization detection (GC × GC–FID) was used for quantification of C 6 through C 12 aromatic hydrocarbons by carbon number in gasolines. A 0.53 mm i.d. non-polar first dimension column was coupled to a 0.53 mm i.d. polar second dimension column through a double loop eight port valve modulator. Depending on the sample type, normalized percent and internal standard (I.S.) quantification was performed. For normalized percent quantification, a one-point calibration performed with one aromatic compound per carbon number/class provided an average % accuracy of 2.1% and a short-term n − 1 relative standard deviation of 1.0%. For total aromatic compounds good agreement with the more complex conventional multidimensional GC technique was obtained. However, GC × GC has certain advantages over most other methods, mainly increased selectivity for total and carbon number aromatic content. The identification of the aromatic hydrocarbons was confirmed by GC × GC–MS.