GB/T 27894.4-2012
天然氣 在一定不確定度下用氣相色譜法測定組成 第4部分:實驗室和在線測量系統中用兩根色譜柱測定氮、二氧化碳和C1至C5及C6+的烴類
Natural gas.Determination of composition with defined uncertainty by gas chromatography.Part 4:Determination of nitrogen,carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns
GBT27894.4-2012, GB27894.4-2012