Summary
A capillary column gas chromatographic system employing two serially coupled fused-silica columns and a simple coupling element is described. The system is operated in flow-tunable mode (flow-tunable tandem system).
The very fact of continuous tuning over a large polarity (selectivity) range, ultimately determined by the two constituent columns, offers several possibilities in the analysis of complex mixtures. In this paper two applications are discussed in detail: optimization of peak separation and peak identification. For these applications it is feasible to use, retention data collected from experiments on the tandem system, and empirical formulas. A relatively simple theoretical mathematical model valid for the flow-tunable tandem system, however, furnishes an easy way of calculating retention data on the system from data collected from the individual single columns, thus, creating a new possibility for optimization and peak identification.
Optimization and peak identification processes using the empirical and theoretical models are both demonstrated by analysis of solvent mixtures.
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Dedicated to the memory of Dr. Tibor Tóth
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Garay, F. Application of a flow-tunable, serially coupled gas chromatographic capillary column system for the analysis of complex mixtures. Chromatographia 51, S108–S120 (2000). https://doi.org/10.1007/BF02492792
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DOI: https://doi.org/10.1007/BF02492792