KS I ISO 6974-4-2006 天然气.用气相色谱法测定规定的不确定度组分的测定.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 dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns