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Measurement of retention in comprehensive two-dimensional gas chromatography using flow modulation with methane dopant |
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| Authors: | Matthew S Klee Leonid M Blumberg |
| Institution: | 1. Agilent Technologies, Inc., 2850 Centerville Rd., Wilmington, DE 19808, USA;2. Fast GC Consulting, P.O. Box 1243, Wilmington, DE 19801, USA |
| Abstract: | Flow modulation of methane-doped carrier gas is used to visualize the second dimension hold-up time in GC × GC continuously throughout the run. This provides an internal reference of hold-up time and presents a straightforward means of examining retention in each dimension of GC × GC. Retention factors on similar and dissimilar column pairs are examined. Stationary phase bleed is shown to be retained by the second dimension column. |
| Keywords: | GC × GC Flow modulation Hold-up time Temperature-programmed GC Elution retention factors |
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