EN ISO 6974-4:2001 天然氣.用氣相色譜法測(cè)定規(guī)定的不確定度的組分.第4部分:用兩柱測(cè)定實(shí)驗(yàn)室和在線測(cè)量系統(tǒng)用的氮,二氧化碳和C1至C5和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