EN ISO 6974-5:2014 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
This part of this International Standard describes a gas chromatographic method for the quantitative determination of the content of nitrogen, carbon dioxide and the individual C1 to C5 hydrocarbons and a C6+ composite measurement that represents all hydrocarbons with six or more hydrocarbon atoms in natural gas samples. It is applicable for the analysis of gases whose components lie in the working ranges specified in Table 1.
EN ISO 6974-5:2014 Referenced Document
ISO 10723:2012 Natural gas - Performance evaluation for analytical systems
ISO 6974-1:2012 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition
ISO 6974-2:2012 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations
ISO 6976:1995 Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
EN ISO 6974-5:2014 history
2014EN ISO 6974-5:2014 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
2001EN ISO 6974-5:2001 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 5: Determination of Nitrogen, Carbon Dioxide and C1 to C5 and C6+ Hydrocarbons for a Laboratory and On-Line Process Application Using Three Columns