ISO 6974-1:2012
Current
Current
The latest, up-to-date edition.
Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 1: General guidelines and calculation of composition
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Published date
05-15-2012
Important note : All end users must be registered with an Account prior to user licenses being assigned.| Committee |
ISO/TC 193/SC 1
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| DevelopmentNote |
Together with ISO 6974-2, ISO 6974-3, ISO 6974-4 and ISO 6974-5, it Supersedes ISO 6974:1984 (03/2001) Supersedes ISO/DIS 6974-1. (05/2012)
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| DocumentType |
Standard
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| Pages |
41
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| PublisherName |
International Organization for Standardization
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| Status |
Current
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| Supersedes |
| Standards | Relationship |
| DIN EN ISO 6974-1:2012-11 | Identical |
| UNE-EN ISO 6974-1:2013 | Identical |
| NF EN ISO 6974-1 : 2012 | Identical |
| NBN EN ISO 6974-1 : 2012 COR 2012 | Identical |
| NEN EN ISO 6974-1 : 2012 C1 2012 | Identical |
| NS EN ISO 6974-1 : 2012 AC 2012 | Identical |
| I.S. EN ISO 6974-1:2012 | Identical |
| PN EN ISO 6974-1 : 2012 AC 2014 | Identical |
| SN EN ISO 6974-1 : 2012 CORR 2013 | Identical |
| UNI EN ISO 6974-1 : 2012 | Identical |
| NEN EN ISO 6974-1:2012 | Identical |
| SN EN ISO 6974-1:2012 | Identical |
| SS-EN ISO 6974-1:2012 | Identical |
| PN-EN ISO 6974-1:2012 | Identical |
| BIS IS 15130-1 : 2017 | Identical |
| BS EN ISO 6974-1:2012 | Identical |
| BS ISO 6974-1 : 2000 AMD 13845 | Identical |
| NEN ISO 6974-1 : 2000 | Identical |
| BS EN 16726 : 2015 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| BS EN 16723-2:2017 | Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network Automotive fuels specification |
| 16/30312922 DC : 0 | BS ISO 18888 - GAS TURBINE COMBINED CYCLE POWER PLANTS THERMAL PERFORMANCE TESTS |
| 17/30326671 DC : 0 | BS ISO 27919-1 - CARBON DIOXIDE CAPTURE - PART 1: PERFORMANCE EVALUATION METHODS FOR POST-COMBUSTION CO[2] CAPTURE INTEGRATED WITH A POWER PLANT |
| 14/30296490 DC : 0 | BS EN 16723-2 - NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUEL SPECIFICATIONS |
| S.R. CEN ISO TR 24094:2007 | ANALYSIS OF NATURAL GAS - VALIDATION METHODS FOR GASEOUS REFERENCE MATERIALS |
| I.S. EN 16723-2:2017 | NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION |
| UNE-EN ISO 6974-5:2015 | 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 6974-5:2014) |
| BS EN ISO 13686:2013 | Natural gas. Quality designation |
| UNE-EN ISO 14532:2017 | Natural gas - Vocabulary (ISO 14532:2014) |
| UNE-EN ISO 6976:2017 | Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition (ISO 6976:2016) |
| BS EN ISO 14111:1999 | Natural gas. Guidelines to traceability in analysis |
| BS EN ISO 6976:2005 | Natural gas. Calculation of calorific values, density, relative density and Wobbe index from composition |
| I.S. EN ISO 13686:2013 | NATURAL GAS - QUALITY DESIGNATION (ISO 13686:2013) |
| EN 12405-2:2012 | Gas meters - Conversion devices - Part 2: Energy conversion |
| DIN EN 16723-2:2017-10 | NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION |
| BS EN ISO 6974-6:2008 | Natural gas. Determination of composition with defined uncertainty by gas chromatography Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns |
| PD ISO/TR 29922:2017 | Natural gas. Supporting information on the calculation of physical properties according to ISO 6976 |
| DIN EN 16723-2:2014-06 (Draft) | NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION |
| 10/30203803 DC : 0 | BS ISO 6974-2 - NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: UNCERTAINTY CALCULATIONS |
| ISO 18453:2004 | Natural gas — Correlation between water content and water dew point |
| PD CEN ISO/TR 24094:2007 | Analysis of natural gas. Validation methods for gaseous reference materials |
| 05/30068455 DC : DRAFT MAY 2005 | ISO 23874 - NATURAL GAS - ANALYTICAL REQUIREMENTS FOR HYDROCARBON CONTENT/DEW POINT CALCULATION |
| BS EN ISO 18453:2005 | Natural gas. Correlation between water content and water dew point |
| I.S. EN 12405-2:2012 | GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION |
| I.S. EN 16726:2015 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| DIN EN ISO 6974-2:2012-11 | Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations (ISO 6974-2:2012) |
| UNE-EN ISO 13686:2014 | Natural gas - Quality designation (ISO 13686:2013) |
| BS EN ISO 14532:2017 | Natural gas. Vocabulary |
| I.S. EN ISO 10723:2012 | NATURAL GAS - PERFORMANCE EVALUATION FOR ANALYTICAL SYSTEMS (ISO 10723:2012) |
| I.S. EN ISO 6974-2:2012 | NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: UNCERTAINTY CALCULATIONS (ISO 6974-2:2012) |
| DIN EN ISO 10723:2013-04 | NATURAL GAS - PERFORMANCE EVALUATION FOR ANALYTICAL SYSTEMS (ISO 10723:2012) |
| I.S. EN ISO 6976:2016 | NATURAL GAS - CALCULATION OF CALORIFIC VALUES, DENSITY, RELATIVE DENSITY AND WOBBE INDICES FROM COMPOSITION (ISO 6976:2016) |
| I.S. EN ISO 14532:2017 | NATURAL GAS - VOCABULARY (ISO 14532:2014) |
| I.S. EN ISO 6974-5:2014 | NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS (ISO 6974-5:2014) |
| BS 3156-11.1.2(1997) : 1997 AMD 16104 | ANALYSIS OF FUEL GASES - METHODS FOR NON-MANUFACTURED GASES - HYDROCARBONS AND INERT GASES - EXTENDED ANALYSIS BY GAS CHROMATOGRAPHIC METHOD |
| 11/30232917 DC : 0 | BS ISO 13579-1 - INDUSTRIAL FURNACES AND ASSOCIATED PROCESSING EQUIPMENT - METHOD OF MEASURING ENERGY BALANCE AND CALCULATING EFFICIENCY - PART 1: GENERAL METHODOLOGY |
| UNI EN 12405-2 : 2012 | GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION |
| BS ISO 14532 : 2001 AMD 15911 | NATURAL GAS - VOCABULARY |
| BS EN 12405-2:2012 | Gas meters. Conversion devices Energy conversion |
| 04/30122896 DC : DRAFT SEP 2004 | ISO 15112 - NATURAL GAS - ENERGY DETERMINATION |
| 14/30296487 DC : 0 | BS EN 16723-1 - NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 1: SPECIFICATIONS FOR BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK |
| 12/30264449 DC : DRAFT JULY 2012 | BS EN ISO 6974-5 - NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C1 TO C5 HYDROCARBONS AND C6+ HYDROCARBONS |
| ISO/TR 24094:2006 | Analysis of natural gas — Validation methods for gaseous reference materials |
| I.S. EN ISO 6974-3:2002 | 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 C[8] USING TWO PACKED COLUMNS |
| DIN EN ISO 6975:2005-09 | NATURAL GAS - EXTENDED ANALYSIS - GAS-CHROMATOGRAPHIC METHOD |
| UNE-EN ISO 6974-2:2013 | Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations (ISO 6974-2:2012) |
| BS EN ISO 6974-5:2014 | Natural gas. Determination of composition and associated uncertainty by gas chromatography Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons |
| EN ISO 6974-3:2001 | 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 6974-3:2000) |
| EN ISO 6974-6:2005 | 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 6974-6:2002) |
| EN ISO 6974-2:2012 | Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations (ISO 6974-2:2012) |
| EN ISO 14532:2017 | Natural gas - Vocabulary (ISO 14532:2014) |
| UNI EN ISO 13686 : 2013 | NATURAL GAS - QUALITY DESIGNATION |
| UNI EN ISO 6974-2 : 2012 | NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: UNCERTAINTY CALCULATIONS |
| UNI EN ISO 10723 : 2013 | NATURAL GAS - PERFORMANCE EVALUATION FOR ANALYTICAL SYSTEMS |
| 17/30345272 DC : 0 | BS ISO 14167 - GAS ANALYSIS - GENERAL QUALITY ASPECTS AND METROLOGICAL TRACEABILITY OF CALIBRATION GAS MIXTURES |
| ISO 18888:2017 | Gas turbine combined cycle power plants — Thermal performance tests |
| BS ISO 6974-6 : 2002 | NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND C[1] TO C[8] HYDROCARBONS USING THREE CAPILLARY 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 |
| BS ISO 2314:2009 | Gas turbines. Acceptance tests |
| 17/30345263 DC : 0 | BS EN ISO 6974-3 - NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 3: PRECISION AND BIAS |
| BS ISO 6974-3 : 2000 AMD 13862 | 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 |
| BS ISO 6974-5 : 2000 AMD 13863 | NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: DETERMINATION OF NITROGEN, CARBON DIOXIDE AND C1 TO C5 AND C6+ HYDROCARBONS FOR A LABORATORY AND ON-LINE PROCESS APPLICATION USING THREE COLUMNS |
| ISO 2314:2009 | Gas turbines — Acceptance tests |
| DIN EN 16726:2016-04 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| DIN EN ISO 13686:2013-12 | NATURAL GAS - QUALITY DESIGNATION (ISO 13686:2013) |
| BS EN ISO 6974-4:2001 | Natural gas. Determination of composition with defined uncertainty by gas chromatography Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns |
| BS EN ISO 6974-2:2012 | Natural gas. Determination of composition and associated uncertainty by gas chromatography Uncertainty calculations |
| ISO 6976:2016 | Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition |
| 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 |
| UNE-EN ISO 10723:2013 | Natural gas - Performance evaluation for analytical systems (ISO 10723:2012) |
| ISO 15403:2000 | Natural gas Designation of the quality of natural gas for use as a compressed fuel for vehicles |
| ISO 10723:2012 | Natural gas — Performance evaluation for analytical systems |
| ISO 6974-2:2012 | Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 2: Uncertainty calculations |
| ISO 14532:2014 | Natural gas — Vocabulary |
| 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 |
| DIN EN ISO 6974-5:2014-10 | NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS (ISO 6974-5:2014) |
| BS EN ISO 10723:2012 | Natural gas. Performance evaluation for analytical systems |
| ISO 6975:1997 | Natural gas — Extended analysis — Gas-chromatographic method |
| 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 |
| EN ISO 13686:2013 | Natural gas - Quality designation (ISO 13686:2013) |
| EN ISO 6974-4:2001 | 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 6974-4:2000) |
| EN ISO 18453:2005 | Natural gas - Correlation between water content and water dew point (ISO 18453:2004) |
| EN 16723-2:2017 | Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network - Part 2: Automotive fuels specification |
| EN ISO 6975:2005 | Natural gas - Extended analysis - Gas-chromatographic method (ISO 6975:1997) |
| EN ISO 14111:1999 | Natural gas - Guidelines to traceability in analysis (ISO 14111:1997) |
| EN 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 6974-5:2014) |
| EN ISO 6976:2016 | Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition (ISO 6976:2016) |
| EN ISO 10723:2012 | Natural gas - Performance evaluation for analytical systems (ISO 10723:2012) |
| EN 16726:2015 | Gas infrastructure - Quality of gas - Group H |
| CEN ISO/TR 24094:2007 | Analysis of natural gas - Validation methods for gaseous reference materials (ISO/TR 24094:2006) |
| BS EN ISO 6974-3:2001 | Natural gas. Determination of composition with defined uncertainty by gas chromatography Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns |
| BS ISO 23874 : 2006 | NATURAL GAS - GAS CHROMATOGRAPHIC REQUIREMENTS FOR HYDROCARBON DEWPOINT CALCULATION |
| 15/30289053 DC : 0 | BS ISO 6976 - NATURAL GAS - CALCULATION OF CALORIFIC VALUES, DENSITY, RELATIVE DENSITY AND WOBBE INDEX FROM COMPOSITION |
| DIN EN 12405-2:2012-10 | GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION |
| 12/30247157 DC : 0 | BS ISO 14532 - NATURAL GAS - VOCABULARY |
| BS ISO 18888:2017 | Gas turbine combined cycle power plants. Thermal performance tests |
| BS ISO 6974-4 : 2000 AMD 13838 | 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 |
| UNE-EN 12405-2:2013 | Gas meters - Conversion devices - Part 2: Energy conversion |
| BS ISO 6974-2 : 2001 AMD 13855 | NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: MEASURING-SYSTEM CHARACTERISTICS AND STATISTICS FOR PROCESSING OF DATA |
| DIN EN ISO 18453:2006-01 | Natural gas - Correlation between water content and water dew point (ISO 18453:2004) |
| ISO/TR 29922:2017 | Natural gas Supporting information on the calculation of physical properties according to ISO 6976 |
| ISO 23874:2006 | Natural gas Gas chromatographic requirements for hydrocarbon dewpoint calculation |
| I.S. EN ISO 6974-6:2005 | NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 6: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND C[1] TO C[8] HYDROCARBONS USING THREE CAPILLARY COLUMNS |
| I.S. EN ISO 18453:2005 | NATURAL GAS - CORRELATION BETWEEN WATER CONTENT AND WATER DEW POINT |
| ISO 13686:2013 | Natural gas Quality designation |
| BS EN ISO 6975:2005 | Natural gas. Extended analysis. Gas chromatographic method |
| DIN EN ISO 6974-6:2005-08 | Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C<(Index)1> to C<(Index)8> hydrocarbons using three capillary columns (ISO 6974-6:2002) |
| DIN EN ISO 6974-5:2002-06 | NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS (ISO 6974-5:2014) |
| ASME PTC46 : 2015 | PERFORMANCE TEST CODES - OVERALL PLANT PERFORMANCE |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| 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 6974-2:2012 | Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 2: Uncertainty calculations |
| 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 10723:2012 | Natural gas — Performance evaluation for analytical systems |
| ISO 16664:2017 | Gas analysis — Handling of calibration gases and gas mixtures — Guidelines |
| 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 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 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
| ISO 5479:1997 | Statistical interpretation of data — Tests for departure from the normal distribution |
| 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) |
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