GB/T 27894.2-2020 in English

VALID

Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 2:Uncertainty calculations

Issued on:2020-09-29
Implemented on:2021-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
$243.00

Standard No:	GB/T 27894.2-2020
Document status:	VALID
Title in English:	Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 2:Uncertainty calculations
Title in Chinese:	天然气用气相色谱法测定组成和计算相关不确定度第2部分：不确定度计算
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-09-29
Implemented on:	2021-04-01
Superseding:	GB/T 27894.2-2011 Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 2: Measuring-system characteristics and statistics for processing of data
ICS Classification:	75.060-Natural gas
Chinese Classification:	E24-Natural gas
Professional Classification:	GB-National Standard
Related Keywords:	uncertainty certified gas reference materials natural gas determination natural gas energy unconventional natural gas uncertainty calculations introduction analysis
Related Topics:	Chromatographic peak calculation Uncertainty, Uncertainty Analysis Calculation of Uncertainty uncertain relationship Tolerances and Uncertainties Chromatography related English Chromatography related English Gas Chromatography Resolution Furniture Uncertainty Gas Chromatography Calculations No peak in gas chromatography Calculation by gas phase method Chromatographic method calculation Gas Chromatography + Resolution Natural Gas Chromatography Uncertainty Automatic Calculation Gas phase calculation Natural gas 6974 scientific uncertainty Gas phase calculation method Cross spectrum calculation Uncertainty calculation formula Uncertainty calculation formula Calculation method for gas chromatography analysis gas phase confirmation Gas phase calculation Chromatographic calculation with gas phase Gas phase separation Standard Uncertainty Analysis Calculate the cross spectrum Spectral Uncertainty Uncertainties of standard materials Calculation of Uncertainty Gas Chromatography Calculations GC peak instability Standard substance uncertainty How to calculate absolute content by gas chromatography Standard substance uncertainty Standard substance uncertainty Calculation formula of uncertainty no peak in gas phase gas chromatography natural gas Calculation and calculation of standard uncertainty Chromatographic insufficiency Chromatographic measurement uncertainty Relative Quantitative Calculations 2 Normal Phase Chromatography Calculations Composition determined by gas chromatography Gas Chromatography Uncertainty Composition of gas phase What are the components of gas chromatography Relative Uncertainty Calculation Formula gas phase natural gas particle size uncertainty Gas phase composition calculation Fit uncertainty Uncertainty in data fit Gas Chromatography Resolution Gas phase content calculation Determination of natural gas components Gas Chromatography is different Gas Chromatography Calculations Oxygen Relative Accuracy Uncertainty per concentration curve How to determine the composition by gas chromatography How to determine the composition of chromatography Gas Chromatography Peak Calculations asme uncertainty Components of a gas chromatograph gas phase peak separation material uncertainty Uncertainty standard iso Gas Chromatography Uncertainty Uncertainty for methane The gas phase does not heat up bottle uncertainty Thermo-hygrometer uncertainty Determination uncertainty of cadmium element Gas phase separation No peak in gas chromatography Asymmetry Calculation standard gas uncertainty Quarter Uncertainty standard uncertainty Approximate range of uncertainty Gas phase calculation method Liquid uncertainty No oxygen peak in gas chromatography Gas Chromatography is different Gas Chromatography G5 No Peak Cross spectrum calculation Chromatographic Analysis Calculation Method Component systems of gas chromatography gas spectrometry Determine the composition of the phase Chromatographic composition standard gas uncertainty Calorific value uncertainty Autospectrum cross-spectrum calculation Gas Chromatography Composition Gas Chromatography Composition Lead Uncertainty Components of a Gas Chromatography System Gas Chromatography System Composition Moore's uncertainty Gas Chromatography System Composition Arsenic Uncertainty Axial Force Uncertainty Uncertainty system The gas chromatograph does not Gas phase + separation Calculations related to analytical methods Gas hundred field uncertainty calculation Uncertainty reference Relative Uncertainty of Standard Materials Cadmium Uncertainty Evaluation standard material, uncertainty Calculation method of uncertainty Gas Chromatography Suddenly No Peaks Autospectral and crossspectral calculations Arsenic Uncertainty Chromatography related Arsenic Uncertainty Uncertainty tool Gas chromatography. No peak Calculation Uncertainty How to calculate gas phase composition Gas Chromatography Resolution Aluminum Uncertainty atomic uncertainty Evaluation of cadmium uncertainty Gas Chromatography + Uncertainty Gas Chromatography Peak Width Instability Determination of components Moisture determination calculation Standard Uncertainty of Measurement Lead Uncertainty Dissolution calculation Aluminum Density Uncertainty Uncertainty k Uncertainties and Tolerances Rice Cadmium Uncertainty add uncertainty Uncertainty constant Fit uncertainty Aluminum Uncertainty Uncertainty of decision Confirmation Uncertainty atomic uncertainty Gas phase content calculation Uncertainty range uncertain relationship Calculation method for gas chromatography analysis How to calculate the uncertainty of 100 games Composition of gas phase how to calculate relative accuracy different Relative Uncertainty Analysis standard gas uncertainty beyond the uncertainty sampling uncertainty how to calculate uncertainty How to use uncertainty Uncertainty standard What determines the uncertainty high temperature uncertainty Infrared Uncertainty Infrared Spectral Uncertainty Response Factor Uncertainty Atomic cadmium uncertainty Mass Spectrometry Uncertainty asme uncertainty Rice Cadmium Uncertainty Aluminum Uncertainty gas uncertainty relative atomic mass uncertainty Calculate Volume Uncertainty Calculation Gas phase is not linear Standard Curve Relative Uncertainty Resolution Uncertainty relative standard uncertainty Relative uncertainty size Extended Uncertainty Liquid phase is not linear Uncertainty range Gas chromatograph does not heat up Portable Gas Chromatography Uncertainty Bioassay Uncertainty group determination method how to determine linear correlation Uncertainty software How to divide two uncertainties How to calculate gas phase content Calculations Related to Chromatography Uncertainty for calcium and magnesium Moisture determination calculation Manganese Uncertainty Chromatographic system composition Uncertainty in meters Uncertainties e and 3 Aluminum density uncertainty Relative Uncertainty Total Uncertainty Significant Figures Uncertainty distribution Tool uncertainty How to Calculate Gas Chromatography Gas Chromatography Composition Natural gas gas phase Determination of sample uncertainty Natural Gas Chromatography Gas Chromatography Composition System Calculation of Accuracy Leachable Uncertainty Uncertainty of the aluminum cup How to calculate content by gas chromatography No location calculation Resolution Uncertainty GB/T 27894.2 GB/T 27894.2-2011 GB/T 27894.2-2020 Standard Curve Uncertainty Calculation Standard Curve Uncertainty Calculation Gas phase composition calculation Uncertainty evaluation of molecular weight in gel chromatography Gas chromatography is not parallel Gas chromatography yield calculation Gas chromatography concentration calculation formula Chromatographic ignition failed How to calculate the concentration of chromatograph Relative quantitative PCR calculation How to calculate gas phase split ratio The accuracy of gas chromatography external standard measurement is not high gas chromatography calculation formula Liquid phase quantification limit calculation formula ATC salinity meter is inaccurate Gas Chromatography Accuracy The applicability of the gas chromatography system does not produce peaks Gas chromatography peak height cannot be increased The difference between split and non-split gas chromatographs Gas Chromatography Formulas and Calculations How to determine the content of each component using gas chromatography Uncertainty Calculation of Standard Curve How to calculate the resolution of liquid phase analysis method Standard uncertainty calculator online Trusted computing related standards and Relative standard uncertainty calculation Uncertainty assessment of standard thermometers uncertainty Natural gas storage related standards What are the categories of uncertainty assessment methods? Relative quantitative calculation method Normal Phase Method Development Mobile Phase Determination Gas Chromatography Standard Deviation Calculation Uncertainty detection method How to calculate the uncertainty of the standard curve How to determine the liquid phase method Method expansion uncertainty Mass Relative Standard Uncertainty Quantitative calculation method of Ramman spectrum Gas chromatography calculation method shoulder peak Chromatographic quantitative calculation method How to calculate the inner diameter of a chromatographic column Algorithms related to chromatography development Chromatographic internal standard method calculation method How to calculate the uncertainty of standard weights How to calculate the standard uncertainty of weights What calculation method is used for gas phase measurement of related substances? How to calculate standard uncertainty Liquid chromatography standard curve calculation Gas chromatograph area calculation method How to determine chromatographic conditions Methods for measuring statistical uncertainty How to calculate the standard uncertainty of accuracy grade How to determine the chromatographic column method Calculate uncertainty using sample standard deviation Standard uncertainty calculation method Uncertainty Classification and Assessment Methods Relative quantitative calculation method Methods for determination of components of raw natural gas Accuracy calculation method Uncertainties are classified according to assessment methods Uncertainty is divided into Uncertainty is classified according to the assessment method as Uncertainty can be divided into Gas Chromatograph Split Ratio Calculation Method Pipette Standard Uncertainty Uncertainty of analytical method Standard uncertainty calculation formula Uncertainty Assessment Techniques and Methods

《GB/T 27894.2-2020天然气用气相色谱法测定组成和计算相关不确定度第2部分：不确定度计算》由TC244（全国天然气标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Analysis of the core content of the standard

Technical elements	Type I analysis mode	Type II analysis mode
Sources of uncertainty	Certified gas reference materials, analysis process, data fitting	Random factors + linear response system errors
Calculation formula	Equation (1) Multi-parameter joint evaluation	Equation (2)(3) Slope correction method
Detector requirements	FID uncertainty ≤2%, TCD ≤10% (Appendix B)

Evolution of key technologies

Main improvements compared to the 2011 version:

New methane subtraction method (Appendix A): Calculate the uncertainty after subtraction by using equations (A.1)-(A.3)
Optimize response factor evaluation: Clarify the normative requirements for FID/TCD relative response factors
Introduce GLS algorithm: Generalized least squares method reduces the conservative error of multiple normalization

Implementation recommendations

Key points for laboratory operation

Regular verification of response linearity is required when using gas chromatograph (Clause 5.3.2.4)
For C6+ components, the successive normalization method (Equation 16) is recommended
When calculating the expanded uncertainty, it is recommended that the inclusion factor k be 2 (corresponding to 95% confidence level)

Typical application scenarios

This standard is particularly suitable for:

Composition analysis in LNG custody transfer measurement
Verification of pipeline natural gas energy metering system
Component monitoring in the development of unconventional natural gas

More samples: JC/T 2453-2018 GB 50021-2001(2009) DL/T 368-2010

Sample only — not a preview of GB/T 27894.2-2020

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