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A technique is described for measuring the concentration of dissolved methane in water samples. A 250 μL 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...
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