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A water trap for static cryo-headspace gas chromatography

✍ Scribed by Kolb, Bruno ;Zwick, Gerhard ;Auer, Maria

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
539 KB
Volume
19
Category
Article
ISSN
0935-6304

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✦ Synopsis

The headspace gas in static headspace gas chromatography contains mostly saturated water vapor. In the case of the cryofocusing enrichment technique this may cause baseline distortion in the early part of the chromatogram or may even lead to ice-plugging of the capillary column. A water-trap is described in which the water vapor is removed from the headspace gas before entering the cryo-trap. The water trap is packed with lithium chloride on a porous support and is regenerated after each analysis by heating under backflush conditions. It therefore can be used for automatic operation. Data are given for the precision and accuracy, and some practical examples for environmental and flavor analysis are shown.

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