KS I ISO 6974-4-2022 天然氣用氣相色譜法測定具有規(guī)定不確定度的組分第4部分:實驗室和雙柱在線測量系統(tǒng)用氮、二氧化碳和C1至C5和C6+碳氫化合物的測定
Natural gas Determination of composition with defined uncertainty by gas chromatography Part 4: Determination of nitrogen, carbon dioxide and C 1 to C 5 and C 6+ hydrocarbons for a laboratory and on l