BS EN ISO 6974-5:2014 天然氣. 采用氣相色譜法對組成及相關(guān)不確定性的測定. 氮, 二氧化碳, C1至C5烴類及C6+烴類的等溫法
Natural gas. Determination of composition and associated uncertainty by gas chromatography. Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons