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
01-12-2013
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
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