Analysis of dissolved gases by headspace sampling gas chromatography with column and detector switching. Preliminary results

Type Article
Date 1996-10
Language English
Author(s) Sarradin Pierre-Marie1, Caprais Jean-Claude1
Affiliation(s) 1 : IFREMER, Centre de Brest, DROIEP, BP 70,29280 Plouzane, France
Source Analytical Communications (1359-7337) (Royal Soc Chemistry), 1996-10 , Vol. 33 , N. 10 , P. 371-373
DOI 10.1039/ac9963300371
WOS© Times Cited 27
Abstract This preliminary study presents a new method for the determination of dissolved gases in sea-water. After headspace extraction, gaseous compounds are separated by GC on a dual column adsorption system, The individual species are thereafter eluted to three different detectors (thermal conductivity, flame ionization and FPD) using a second switching valve, The analysis is quantitative for methane and carbon dioxide with limits of determination of 0.1 and 50 mu mol l(-1), respectively, and corresponding standard deviations of 4 and 7%, and has been applied to deep sea hydrothermal samples, Further optimization is necessary to allow the quantitative determination of hydrogen sulfide, nitrogen, oxygen and carbon monoxide.
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