メタンを主成分とするガス中の微量軽質炭化水素の測定法 [in Japanese] Measurement of trace light hydrocarbons in methane-rich gases [in Japanese]
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A system to measure C<sub>2+</sub> light hydrocarbons (CnHm, n≧2) in methane-rich gases is reported. Until now, measurement of trace C<sub>2+</sub> light hydrocarbons by gas chromatography (GC) has been difficult, because C<sub>2+</sub> hydrocarbons could not be separated well from methane. In this system, C<sub>2+</sub> hydrocarbon concentration column (stainless hollow pipe) is equipped between GC injection and GC column. With the C<sub>2+</sub> hydrocarbon concentration column, only C<sub>2+</sub> hydrocarbons are concentrated and methane is removed. After the removal of methane, precise measurement of C<sub>2+</sub> hydrocarbons by GC becomes possible.
Chikyukagaku 29(1), 17-23, 1995
The Geochemical Society of Japan