Analysis of dissolved gases by headspace sampling gas chromatography with column and detector switching. Preliminary results
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Analytical Communications
- Vol. 33 (10) , 371-373
- https://doi.org/10.1039/ac9963300371
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 µmol 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.Keywords
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