Determination of aromatic hydrocarbons in gasolines by flow modulated comprehensive two-dimensional gas chromatography
| Autor: | Frank P. Di Sanzo, John W. Diehl |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Flame Ionization
chemistry.chemical_classification Chromatography Gas Chromatography Organic Chemistry Analytical chemistry Reproducibility of Results General Medicine Hydrocarbons Aromatic Biochemistry Analytical Chemistry law.invention Hydrocarbon Two-dimensional chromatography chemistry law Ionization Calibration Flame ionization detector Gas chromatography Gasoline Quantitative analysis (chemistry) |
| Zdroj: | Journal of Chromatography A. 1080:157-165 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/j.chroma.2004.11.054 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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