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GB/T 27894.1-2020Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition (English PDF)

天然气用气相色谱法测定组成和计算相关不确定度第1部分：总导则和组成计算

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

September 29, 2020

Implementation date

April 1, 2021

Scope

GB/T 27894.1-2020 is the English-translated version of 天然气用气相色谱法测定组成和计算相关不确定度第1部分：总导则和组成计算.

GB/T 27894.1-2020 is the Chinese standard "Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition".

Its scope clause reads: This part of GB/T 27894 gives the method for calculating the mole fraction of natural gas components, and specifies the processing when determining the mole fraction of components The data requirements are applicable to single operation and multiple operation methods, as well as multi-point calibration method or single point used after the performance evaluation of the analyzer Correction method.

This section gives the raw data and processed data (such as normalization processing) of all component mole fractions and their associated uncertainties The processing process is suitable for processing data obtained from repeated analysis or single analysis of natural gas samples. Its clauses include terms and definitions.

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Document preview — GB/T 27894.1-2020

National Standard of the People's Republic of China

ICS: 75.060
Classification: E 24
Replacing: GB/T 27894.1-2011

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbol
5 Principles of Analysis
6 Analysis process
7 Control Chart
8 Test report
Appendix B (informative appendix) Bridging components and normalization methods
Appendix C (informative appendix) Methane subtraction method
Appendix D (Normative Appendix) Relative Response Factor
Appendix E (Informative Appendix) Judgment of Outliers
Appendix F (Normative Appendix) Pressure Correction in Calibration and Sample Analysis
Appendix G (informative appendix) Applicable software for generalized least squares regression analysis
Appendix H (Informative Appendix) Use of Control Chart

1 Scope

This part of GB/T 27894 gives the method for calculating the mole fraction of natural gas components, and specifies the processing when determining the mole fraction of components

The data requirements are applicable to single operation and multiple operation methods, as well as multi-point calibration method or single point used after the performance evaluation of the analyzer

Correction method. This section gives the raw data and processed data (such as normalization processing) of all component mole fractions and their associated uncertainties

The processing process is suitable for processing data obtained from repeated analysis or single analysis of natural gas samples.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated references, the latest version (including all amendments) applies to this document.

ISO /IEC Guide 98-3 Measurement Uncertainty Part 3.The Expression Method of Measurement Uncertainty (GUM.1995) [Uncer- taintyofmeasurement-Part 3.Guidetotheexpressionofuncertaintyin measurement(GUM.

1995)]

ISO 6143 Gas analysis-Comparison methods (Gasanalysis-Comparison methods) fordeterminingandcheckingthecompositionofcalibrationgasmixtures)

ISO 10723 Natural gas analysis system performance evaluation (Naturalgas-Performance evaluationforanalyticalsys- tems)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Response

The output signal of a certain component of the measuring system is expressed in the form of peak area or peak height.

3.2 Reference component

The component of the certified standard gas mixture (CRM) as the reference material (refer to 3.10), used to calibrate the

The response value of other similar components in the sample.

Note. For example, CRM contains hydrocarbons up to n-butane, but does not contain pentane or higher components, then n-butane in CRM can be used as pentane or heavier in the sample

The quantitative reference component of the component. The reference component usually has a first-order response function with zero intercept, that is, a straight line passing through the origin.

3.3 Relative response factor

The molar response ratio of the sample component j and the reference component through the same detector.

GB/T 22724 | GB/T 20368 | GB/T 26978 | GB/T 27894.8 | GB/T 27894.7 | GB/T 27894.3 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 64 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 6143 · ISO 10723

Cited by

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