GOST 31371.4-2008
天然气.用气相色谱分析法测定规定了不确定度的组分.第4部分:利用两个封装柱在实验室和在线测量系统进行的氢、氦、氧、氮、二氧化碳和C1到C5及C6+碳氢化合物测定
Natural gas. Determination of composition with defined uncertainty by gas chromatography method. 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