BS ISO 6974-4 : 2000 AMD 13838

Name: BS ISO 6974-4 : 2000 AMD 13838
Brand: BSI

Superseded

View Superseded by

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

Superseded date

15-07-2002

Published date

23-11-2012

Publisher

British Standards Institution

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

A gas chromatographic method for the quantative determination of natural gas constituents using a two-column system is described in this part of ISO 6974. It is applicable to determinations made in the laboratory or in on-line processes. It also applies to the analysis of gases containing constituents within the mole fraction ranges given in Table 1. These ranges do not represent the limits of detection, but the limits within which the stated accuracy of the method applies. Although one or more components in a sample may not be detected present, the method can still be applicable. Only applicable if used in conjunction with Parts 1 and 2 of ISO 6974. TABLE 1 - APPLICATION RANGES forms part of this scope.

Committee	PTI/15
DevelopmentNote	Together with BS ISO 6974-1, BS ISO 6974-2, BS ISO 6974-3 and BS ISO 6974-5 it supersedes BS 3156-11.1.1(1986). (07/2000) Renumbered and superseded by BS EN ISO 6974-4 Supersedes 95/123188 DC (08/2002)
DocumentType	Standard
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN ISO 6974-4:2001
Supersedes	BS 3156-11.1.1:1986 95/123188 DC : DRAFT JUN 1995

Standards	Relationship
ISO 6974-4:2000	Identical

ISO 6143:2001	Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures
ISO 6142:2001	Gas analysis Preparation of calibration gas mixtures Gravimetric method
ISO 6974-1:2012	Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 1: General guidelines and calculation of composition
ISO 7504:2015	Gas analysis Vocabulary