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On-line sample enrichment–capillary gas chromatography of aqueous samples using geometrically deformed open-tubular extraction columns

✍ Scribed by Hans G. J. Mol; Hans-Gerd Janssen; Carel A. Cramers; Udo A. Th. Brinkman

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
823 KB
Volume
7
Category
Article
ISSN
1040-7685

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✦ Synopsis

The effect of geometrical deformation of open-tubular extraction columns on peak dispersion of retained solutes is evaluated. By coiling or stitching of the columns peak dispersion is decreased, with a factor of two and more than five, respectively, due to secondary flow enhanced radial dispersion. This enables the increase of sampling flow rates in on-line extraction-GC using open-tubular extraction columns up to 4 mL/min while still obtaining quantitative trapping of the analytes.

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