Analysis of siloxanes in hydrocarbon mixtures using comprehensive two-dimensional gas chromatography
| Autor: | John V. Seeley, Stacy K. Seeley, Steven Nartker, Abhijit Ghosh |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Chromatography Gas Chromatography Siloxanes Organic Chemistry General Medicine Biochemistry Hydrocarbons Analytical Chemistry Hydrocarbon mixtures chemistry.chemical_compound Hydrocarbon chemistry Biogas Biofuels Two-dimensional gas Narrow range Kovats retention index Gas chromatography Gasoline |
| Zdroj: | Journal of Chromatography A. 1360:258-263 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/j.chroma.2014.07.062 |
| Popis: | A comprehensive two-dimensional gas chromatography (GC×GC) method for separating siloxanes from hydrocarbons has been developed using a systematic process. First, the retention indices of a set of siloxanes and a set of hydrocarbons were determined on 6 different stationary phases. The retention indices were then used to model GC×GC separation on 15 different stationary phase pairs. The SPB-Octyl×DB-1 pair was predicted to provide the best separation of the siloxanes from the hydrocarbons. The efficacy of this stationary phase pair was experimentally tested by performing a GC×GC analysis of gasoline spiked with siloxanes and by analyzing biogas obtained from a local wastewater treatment facility. The model predictions agreed well with the experimental results. The SPB-Octyl×DB-1 stationary phase pair constrained the hydrocarbons to a narrow range of secondary retention times and fully isolated the siloxanes from the hydrocarbon band. The resulting GC×GC method allows siloxanes to be resolved from complex mixtures of hydrocarbons without requiring the use of a selective detector. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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