BS EN ISO 6974-5:2014 Natural gas. Determination of composition and associated uncertainty by gas chromatography. Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons
ISO 10723 Natural gas - Performance evaluation for analytical systems
ISO 6974-1 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition; Technical Corrigendum 1
ISO 6974-2 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations
ISO 6976 Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition*, 2016-08-01 Update
ISO 7504 Gas analysis - Vocabulary*, 2015-05-01 Update
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
BS EN ISO 6974-5:2014 history
2014BS EN ISO 6974-5:2014 Natural gas. Determination of composition and associated uncertainty by gas chromatography. Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons
2012BS EN ISO 6974-1:2012 Natural gas. Determination of composition and associated uncertainty by gas chromatography. General guidelines and calculation of composition
0000 BS EN ISO 6974-1:2000
1986BS 3156-11.1.1:1986 Analysis of fuel gases. Methods for non-manufactured gases. Hydrocarbons and inert gases. Determination of hydrocarbons to C and inert gases by gas chromatography