BS ISO 6974-2. Natural gas. Determination of composition and associated uncertainty by gas chromatography. Part 2. Uncertainty calculations
BS ISO 6974-2 天然气 用气相色谱法测定成分和相关不确定度 第二部分 不确定性计算

2010-04-20

Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 1: Guidelines for tailored analysis. (ISO 6974-1:2000)
天然气.用气相色谱法测定规定不确定度的成分.第1部分:定制分析指南 （ISO 6974-1-2000）

2003-01-17

Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C<(Index)1> to C<(Index)8> hydrocarbons using three capillary columns (ISO 6974-6:2002)
天然气.用气相色谱法测定规定不确定度的成分.第6部分:用三根毛细管柱测定氢、氦、氧、氮、二氧化碳和C<（指数）1>至C<（指数）8>碳氢化合物（ISO 6974-6-2002）；德文版EN ISO 6974-6:2005

2005-08-01

Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 4: Determination of nitrogen, carbon dioxide and C<(Index)1> to C<(Index)5> and C<(Index)6+> hydrocarbons for a laboratory and on-line measuring system using two columns (ISO 6974-4:2000)
天然气.用气相色谱法测定具有规定不确定度的成分.第4部分:实验室和在线测量系统用双柱测定氮 二氧化碳和C<（指数）1>至C<（指数）5>和C<（指数）6+>碳氢化合物（ISO 6974-4:2000）；德文版

2002-06-01