Name: UNI EN ISO 6974-2 : 2012
Brand: UNI

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

Published date

07-19-2012

Publisher

Ente Nazionale Italiano di Unificazione (UNI)

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Calculation of uncertainty
Annex A (informative) - Calculation of processed component
        uncertainties for the methane-by-difference approach
Annex B (normative) - Uncertainties of relative response
        factors
Annex C (informative) - Alternative calculation of the
        uncertainty of the value of the unknown
Bibliography

Defines 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.

Committee	CT 101
DocumentType	Standard
PublisherName	Ente Nazionale Italiano di Unificazione (UNI)
Status	Current
Supersedes	UNI EN ISO 6974-2 : 2005

Standards	Relationship
DIN EN ISO 6974-2:2012-11	Identical
UNE-EN ISO 6974-2:2013	Identical
NF EN ISO 6974-2 : 2012	Identical
ISO 6974-2:2012	Identical
NBN EN ISO 6974-2 : 2012	Identical
NEN EN ISO 6974-2 : 2012	Identical
NS EN ISO 6974-2 : 2012	Identical
I.S. EN ISO 6974-2:2012	Identical
SN EN ISO 6974-2:2012	Identical
BS EN ISO 6974-2:2012	Identical
EN ISO 6974-2:2012	Identical
DIN EN ISO 6974-2 E : 2012	Identical

ISO 10715:1997	Natural gas — Sampling guidelines
ISO 6974-6:2002	Natural gas Determination of composition with defined uncertainty by gas chromatography Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns
ISO 6974-4:2000	Natural gas — Determination of composition with defined uncertainty by gas chromatography — Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns
ISO 6974-3:2000	Natural gas Determination of composition with defined uncertainty by gas chromatography Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns
ISO Guide 35:2017	Reference materials Guidance for characterization and assessment of homogeneity and stability
ISO/IEC Guide 99:2007	International vocabulary of metrology Basic and general concepts and associated terms (VIM)
ISO 6974-1:2012	Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 1: General guidelines and calculation of composition
ISO Guide 31:2015	Reference materials — Contents of certificates, labels and accompanying documentation
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
ISO Guide 34:2009	General requirements for the competence of reference material producers
ISO/IEC Guide 98-3:2008	Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)