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Gas chromatographic water analysis by direct injection of large sample volumes in an adsorbent-packed PTV injector

Gas chromatographic water analysis by direct injection of large sample volumes in an... A GC method is described for the determination of pollutants in aqueous samples by direct enrichment out of large sample volumes in a PTV injector. The vaporized water is eliminated through the split vent and the analytes are concentrated on an adsorbent inside the insert of the PTV. For the selection of suitable adsorbents, breakthrough volumes of selected pesticides and nitroaromatics on Tenax TA, Tenax GR, Chemipack C18 and graphitized carbon blacks have been determined by experiment. The determination of the breakthrough volumes was carried out directly in the PTV insert. Tenax TA proved to be the best sorbent with regard to the breakthrough volumes and its inertness to the analytes to be determined. As the result of the investigations, 500 μl of aqueous standard solutions of pesticides and nitroaromatics (concn.=0.02 ... 2 μg/l) were analyzed with an average relative standard deviation of 10%. The procedure was successfully applied for the analysis of real samples. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chromatographia Springer Journals

Gas chromatographic water analysis by direct injection of large sample volumes in an adsorbent-packed PTV injector

Müller, S.; Efer, J.; Engewald, W.
Chromatographia , Volume 38 (11) – Jun 1, 1994
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References (10)

Publisher
Springer Journals
Copyright
Copyright © 1994 by Friedr. Vieweg & Sohn Verlagschesellschaft mbH
Subject
Chemistry; Analytical Chemistry; Organic Chemistry; Biochemistry, general; Plant Sciences; Pharmacy; Measurement Science, Instrumentation
ISSN
0009-5893
eISSN
1612-1112
DOI
10.1007/BF02269623
Publisher site
See Article on Publisher Site

Abstract

A GC method is described for the determination of pollutants in aqueous samples by direct enrichment out of large sample volumes in a PTV injector. The vaporized water is eliminated through the split vent and the analytes are concentrated on an adsorbent inside the insert of the PTV. For the selection of suitable adsorbents, breakthrough volumes of selected pesticides and nitroaromatics on Tenax TA, Tenax GR, Chemipack C18 and graphitized carbon blacks have been determined by experiment. The determination of the breakthrough volumes was carried out directly in the PTV insert. Tenax TA proved to be the best sorbent with regard to the breakthrough volumes and its inertness to the analytes to be determined. As the result of the investigations, 500 μl of aqueous standard solutions of pesticides and nitroaromatics (concn.=0.02 ... 2 μg/l) were analyzed with an average relative standard deviation of 10%. The procedure was successfully applied for the analysis of real samples.

Journal

Chromatographia – Springer Journals

Published: Jun 1, 1994

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