BS EN ISO 6974-6-2008 天然气.气相色谱法测定合成物的规定不确定度.三支毛细管柱进行氢、氦、氧、氮、二氧化碳和C1到C8碳氢化合物的测定
Natural gas - Determination of composition with defined uncertainty by gas chromatography - Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns