Bubble Extraction of Dissolved Gases from Groundwater Samples

Publication Type:
Journal Article
Water, Air, & Soil Pollution, 1999, 115 (1-4), pp. 525 - 534
Issue Date:
Full metadata record
Files in This Item:
Filename Description Size
Thumbnail2008007445OK.pdf125.44 kB
Adobe PDF
A technique is described for measuring the concentration of dissolved methane in water samples. A 250 L bubble is injected into a 5 mL vial to create a headspace. The headspace gas is subsequently analysed by gas chromatograph. The technique requires a headspace equilibrium time of at least 13 hours. The extraction efficiency of the method for methane saturated water was 101.9% 1%. The technique is applicable to other dissolved gases in groundwater. The method was used during a comparative evaluation of groundwater sampling devices at a field site. It was found that low flow rate sampling with either a Grundfos electric submersible pump or a peristaltic pump were more precise than using a bailer to measure dissolved methane.
Please use this identifier to cite or link to this item: