AENOR UNE-EN ISO 6974-3:2003
天然氣 通過氣相色譜法確定不確定度的成分 第3部分：使用兩個填充柱測定氫氣、氦氣、氧氣、氮氣、二氧化碳和最高 C8 的碳氫化合物 (ISO 6974-3:2000)
Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns. (ISO 6974-3:2000)