NEN EN ISO 6974-4 : 2001
Current
The latest, up-to-date edition.
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
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Materials
5 Apparatus
6 Procedure
6.1 Gas chromatographic operating conditions
6.2 Performance requirements - Peak resolution
6.3 Determination - Outline of the analysis
7 Expression of results
7.1 Calculation
7.2 Precision and accuracy
8 Test report
Annex A (informative) Procedure for setting valve timings
and restriction setting
Annex B (informative) Final time
Annex C (informative) Typical precision values
Bibliography
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