NEN EN ISO 6974-5 : 2014
Current
The latest, up-to-date edition.
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
01-12-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Materials
5 Apparatus
6 Procedure
6.1 Gas chromatographic operating conditions
6.2 Calibration
6.3 Performance requirements
6.3.1 Peak resolution
6.3.2 Chromatogram
6.4 Determination
6.4.1 Sample valve purge
6.4.2 Analysis
7 Expression of results
7.1 Precision and accuracy
8 Test report
Annex A (informative) Procedure for setting valve timings
and restrictor setting
Annex B (informative) Typical precision values
Bibliography
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