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  • NEN EN ISO 6974-2 : 2012

    Current The latest, up-to-date edition.

    NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: UNCERTAINTY CALCULATIONS

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    Published date:  12-01-2013

    Publisher:  Netherlands Standards

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Introduction
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Symbols and subscripts
    5 Procedure
      5.1 Step 1: Determination of the optimal response
          functions
      5.2 Step 2: Selection of the response functions to
          be used in practice
      5.3 Step 3: Routine calibration with a working-
          reference gas mixture
      5.4 Step 4: Calculation of non-normalized component
          mole fractions
      5.5 Step 5: Calculation of non-normalized component
          standard deviations
      5.6 Step 6: Calculation of normalized component mole
          fractions
      5.7 Step 7: Calculation of normalized component
          standard deviations
      5.8 Step 8: Calculation of uncertainty and
          repeatability of the results
      5.9 Relationship between ISO 6974-2 and ISO 6976
    Annex A (informative) Critical values of t
    Annex B (informative) Example
    Annex C (informative) Relative response factors (K)
    Bibliography

    Abstract - (Show below) - (Hide below)

    Explains the process required to determine the uncertainty associated with the mole fraction for each component from a natural gas analysis in accordance with ISO 6974-1.

    General Product Information - (Show below) - (Hide below)

    Development Note Supersedes NEN ISO 6974-2 (07/2002)
    Document Type Standard
    Publisher Netherlands Standards
    Status Current
    Supersedes
    View more information

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