ISO 6974-5:2014
天然气. 采用气相色谱法对组成及相关不确定性的测定. 第5部分: 氮, 二氧化碳, C1至C5烃类及C6+烃类的等温法
Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 5: Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons
说明：
- 此图仅显示与当前标准最近的5级引用；
- 鼠标放置在图上可以看到标题编号；
- 此图可以通过鼠标滚轮放大或者缩小；
- 表示标准的节点，可以拖动；
- 绿色表示标准：ISO 6974-5:2014 ， 绿色、红色表示本平台存在此标准，您可以下载或者购买，灰色表示平台不存在此标准；
- 箭头终点方向的标准引用了起点方向的标准。
- 标准号
- ISO 6974-5:2014
- 发布
- 2014年
- 发布单位
- 国际标准化组织
- 当前最新
- ISO 6974-5:2014
- 引用标准
- ISO 10723:2012 ISO 6974-1:2012 ISO 6974-2:2012 ISO 6976:1995 ISO 7504:2001 ISO/IEC Guide 98-3:2008
- 适用范围
- This part of this International Standard describes a gas chromatographic method for the quantitative determination of the content of nitrogen, carbon dioxide and C1 to C5 hydrocarbons individually and a composite C6+ measurement, which represents all hydrocarbons of carbon number 6 and above in natural gas samples. It is applicable to the analysis of gases containing constituents within the working ranges given in Table 1. Table 1 — Component working ranges Mole fraction Component Nitrogen N2 Min. 0,1 % Max. 22 Carbon dioxide CO2 Propane C3H80,05 neo-Pentane neo-C5H120,0050,35 C6 + 0,0050,35 Methane Ethane iso-Butane n-Butane iso-Pentane n-Pentane Hexanes + CH4 C2H6 i-C4H10 n-C4H10 i-C5H12 n-C5H120,0515341000,012,00,10,010,0050,00523102,00,350,35 NOTE 1 The working ranges in Table 1 are those for which the method has been shown to be satisfactory, and are offered for guidance. However, there is no reason why wider ranges should not be used, provided that the successful measurement of such wider ranges has been demonstrated. NOTE 2 Hydrocarbons above n-pentane are expressed as the “pseudo-component” C6+ which is measured as one composite peak and calibrated as such. The properties of C6+ are calculated from an extended analysis of the individual C6 and higher hydrocarbons. NOTE 3 Oxygen is not a normal constituent of natural gas and would not be expected to be present in gas sampled to an online instrument. If any oxygen is present as a result of air contamination, it will be measured with the nitrogen. The resulting measured (nitrogen + oxygen) value will be in error to a small extent because of the slight difference between the detector responses of oxygen and nitrogen. NOTE 4 The helium and argon contents are assumed to be sufficiently small and unvarying that they need not be analysed for. NOTE 5 The gas sample shall not contain any hydrocarbon condensate and/or water. 1
推荐
不确定度标准文件大全
4部分：实验室和在线测量系统中用两根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类 GB/T 27894.5-2012天然气 在一定不确定度下用气相色谱法测定组成 第5部分：实验室和在线工艺系统中用三根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类 GB/T 27894.6-2012天然气在一定不确定度下用气相色谱法测定组成第6部分：用三根毛细管色谱柱测定氢、氦、氧、氮、二氧化碳和C1至C8的烃类...
不确定度相关的现行有效标准和文件大全
C8的烃类 GB/T 27894.4-2012天然气在一定不确定度下用气相色谱法测定组成第4部分：实验室和在线测量系统中用两根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类 GB/T 27894.5-2012天然气 在一定不确定度下用气相色谱法测定组成 第5部分：实验室和在线工艺系统中用三根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类 GB/T 27894.6-2012天然气在一定不确定度下用气相色谱法测定组成第...
不确定度标准大全，分享收藏
2部分：测量系统的特性和数理统计 GB/T 27894.3-2011天然气在一定不确定度下用气相色谱法测定组成第3部分：用两根填充柱测定氢、氦、氧、氮、二氧化碳和直至C8的烃类 GB/T 27894.4-2012天然气在一定不确定度下用气相色谱法测定组成第4部分：实验室和在线测量系统中用两根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类 GB/T 27894.5-2012天然气 在一定不确定度下用气相色谱法测定组成...
不确定度标准收集全了，可以参考下写不确定度
2部分：测量系统的特性和数理统计 GB/T 27894.3-2011天然气在一定不确定度下用气相色谱法测定组成第3部分：用两根填充柱测定氢、氦、氧、氮、二氧化碳和直至C8的烃类 GB/T 27894.4-2012天然气在一定不确定度下用气相色谱法测定组成第4部分：实验室和在线测量系统中用两根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类 GB/T 27894.5-2012天然气 在一定不确定度下用气相色谱法测定组成...