One of the column was filled with quartz sand as hydrocarbon column, and another with GOX-502 as methane column.

• 用石英砂和GDX-502分别填充总烃柱及甲烷柱；以甲烷标准气定性和外标法峰高定量。 方法精密度实验的变异系数为3.；0%25;