DIN EN ISO 6974-6-2005 天然气.用气相色谱法测定规定了不确定度的组分.第6部分:用三个毛细管柱测定氢、氦、氧、氮、二氧化碳和C1到C8的烃类
Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns (ISO 6974-6:2