EN ISO 6974-1:2012 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition
This part of ISO 6974 gives methods for calculating component mole fractions of natural gas and specifies thedata processing requirements for determining component mole fractions.This part of ISO 6974 provides forboth single and multiple operation methods and either multi-point calibration or a performance evaluation ofthe analyser followed by single-point calibration.This part of ISO 6974 gives procedures for the calculation ofthe raw and processed (e.g. normalized) mole fractions, and their associated uncertainties, for all components.The procedures given inThis part of ISO 6974 are applicable to the handling of data obtained from replicate orsingle analyses of a natural gas sample.
EN ISO 6974-1:2012 Referenced Document
ISO 10723 Natural gas - Performance evaluation for analytical systems*， 2012-12-01 Update
ISO 6143 Gas analysis - Comparison methods for determining and checking the composition of calibration gas mixtures
ISO/IEC Guide 98-3 Uncertainty of measurement - Guide to the expression of uncertainty in measurement (GUM:1995). Extension to any number of output quantities
EN ISO 6974-1:2012 history
2012EN ISO 6974-1:2012/AC:2012 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition - Technical Corrigendum 1 (ISO 6974-1:2012/Cor 1:2012)
2012EN ISO 6974-1:2012 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition
2001EN ISO 6974-1:2001 Natural Gas - Determiantion of Composition with Defined Uncertainty by Gas Chromatography - Part 1: Guidelines for Tailored Analysis ISO 6974-1:2000