ISO 6974-4:2000
天然气 用气相色谱法测定规定的不确定度的组分 第4部分:用两柱测定实验室和在线测量系统用的氮、二氧化碳和碳C<下标>1至碳C<下标>5和碳C<下标>6+的烃类
Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 4: Determination of nitrogen, carbon dioxyde and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using