Title

Analysis of Siloxanes in Hydrocarbon Mixtures Using Comprehensive Two-Dimensional Gas Chromatography

Document Type

Article

Publication Date

7-29-2014

Publication Title

Journal of Chromatography A

Abstract

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.

Volume

1360

First Page

258

Last Page

263

DOI

10.1016/j.chroma.2014.07.062

ISSN

ISSN: 0021-9673, ESSN: 1873-3778

Rights

© 2014 Elsevier B.V. All rights reserved

Link to Full Text

Share

COinS