WLN-CO.W.08.1Determination of methane by means of GC headspacein-house method
Principle:A bottle, semi-filled with sample, is placed during at least 30 minutes in a water bath of 20 °C. After shaking it for 10 minutes, an equilibrium has been reached. From the gas phase 100 μl is injected, separated by means of gas chromatography and detected by means of a flame ionisation detector (FID).
Determination:Methane
Performance characteristics:
Matrices qualified by the Dutch RvA:Drinking water, Groundwater
Reporting limit:0.005 mg/l, matrix dependent
Measurement uncertainty:30%
Sustainability:14 days
Sampling bottle:Glass , white , 350 ml (fill completely; remove half in methane-free environment)
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