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Early solvent vapor exit in GC for coupled LC-GC involving concurrent eluent evaporation

✍ Scribed by Grob, Konrad ;Schmarr, Hans-Georg ;Mosandl, Armin

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 859 KB
Volume: 12
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240120607

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✦ Synopsis

Use of early solvent vapor exits for concurrent eluent evaporation with the loop-type interface has two purposes: protection of the GC detectors from large amounts of solvent vapors and more efficient discharge of the vapors to accelerate eluent evaporation and help avoiding broad solvent peaks. Use of a retaining precolumn after the uncoated pre-column can rule out losses of solute materials that form sharp peaks.

1 Previous Work

CoupledLC GCintroduces largevolumes of solvent (LC eluent) into GC Instead of introducing all of the solvent vapors into the GC detector, it may be preferable to release them through a solventvapor exit This exit is closed after passage of the solvent vapors in order to obtain full sensitimty during analysis by introduction of the whole solute material into the detector Moving needle injection [ 11 and Programmed Temperature Vaporizing (PTV) injection in the solvent split (split/splitless) mode [2] were the first techniques for separating the solvent

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