GB/T 41752-2022Gas analysis - Investigation and treatment of analytical bias (English PDF)
气体分析 分析偏倚的研究与处理
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
October 12, 2022
Implementation date
October 12, 2022
Scope
GB/T 41752-2022 is the English-translated version of 气体分析 分析偏倚的研究与处理.
GB/T 41752-2022 is the Chinese standard "Gas analysis - Investigation and treatment of analytical bias".
Its scope clause reads: This document describes the analysis and correction of bias (systematic error) in gas analysis procedures using a reference gas mixture or a reference analysis procedure. difference), and a general method for assessing the uncertainty of the corrected value.
The main sources of (and contributors to) analytical procedure bias are instrument drift and matrix interferences, which typically vary with analyte concentration.
Therefore, this document describes the following two methods. --- Drift analysis and correction of analytical systems with limited stability; ---For a stable analysis system with determined gas sample composition, its bias can be used in subsequent method development and analysis after research and mastery used in method validation studies.
This document establishes two procedures applicable to the analysis of system effects. a) retrospectively model observed deviations and correct their effects; b) Averaging system effects and expanding uncertainties.
Usually, the first procedure requires more work, but can obtain smaller uncertainties. For ease of use, the methods described in this document are all used to analyze gas composition procedures, for example, the concentration of a specific analyte in a mixed gas measurement procedure.
These methods are equally applicable to the measurement of physical or chemical properties of pure or mixed gases in relation to gas analysis. Its clauses include terms and definitions.
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Document preview — GB/T 41752-2022
National Standard of the People's Republic of China
- ICS
- 71.100.20
- Classification
- G 86
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 symbols
- 5 Bias related to instrument drift
- 5.1 Principle
- 5.2 Stability monitoring
- 5.3 Drift Correction
- 6 Bias due to sample composition
- 6.1 General
- 6.2 Dealing with local bias
- 6.3 Bias treatment beyond the specified measurement range
- 7 Treatment of matrix interference
- 7.1 General
- 7.2 Example A
- 7.3 Example B
- 7.4 Example C
- Appendix A (Normative) Key Values for Trend Testing
- Appendix B (Informative) Uncertainty Question
1 Scope
This document describes the analysis and correction of bias (systematic error) in gas analysis procedures using a reference gas mixture or a reference analysis procedure.
difference), and a general method for assessing the uncertainty of the corrected value.
The main sources of (and contributors to) analytical procedure bias are instrument drift and matrix interferences, which typically vary with analyte concentration.
Therefore, this document describes the following two methods.
--- Drift analysis and correction of analytical systems with limited stability;
---For a stable analysis system with determined gas sample composition, its bias can be used in subsequent method development and analysis after research and mastery used in method validation studies.
This document establishes two procedures applicable to the analysis of system effects.
a) retrospectively model observed deviations and correct their effects;
b) Averaging system effects and expanding uncertainties.
Usually, the first procedure requires more work, but can obtain smaller uncertainties.
For ease of use, the methods described in this document are all used to analyze gas composition procedures, for example, the concentration of a specific analyte in a mixed gas measurement procedure. These methods are equally applicable to the measurement of physical or chemical properties of pure or mixed gases in relation to gas analysis.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 6379.3 Accuracy of measurement methods and results (trueness and precision) Part 3.Standard measurement method precision
Intermediate measurement (GB/T 6379.3-2012, ISO 5725-3.1994, IDT)
GB/T 10628 Determination and verification comparison method of gas analysis and calibration gas mixture composition (GB/T 10628-2008,
ISO 6143.2001, IDT)
GB/T 27418-2017 Evaluation and Expression of Measurement Uncertainty (ISO /IEC Guide98-3.2008, MOD)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 bias
An estimate of the systematic error.
Note. Since the true value of the measurand cannot be known exactly, the systematic error cannot be accurately measured and can only be estimated using reference values.
3.2 correction
The procedure for making adjustments to uncorrected measurements to compensate for systematic errors.
Note 1 to entry. A procedure for adjusting uncorrected measurements to compensate for systematic errors. Since the systematic error cannot be fully known, this compensation does not completely.
Note 2.In ISO /IEC Guide99 [5], the meaning of this term is different.
GB/T 41328 | GB/T 38527 | GB/T 37244 | GB/T 31058 | GB/T 41757 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 52 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 6379.3Accuracy (trueness and precision) of measurement methods and results -- Part 3: Intermediate measures of the precision of a standard measurement method
- GB/T 6379.3-2012Accuracy (trueness and precision) of measurement methods and results -- Part 3: Intermediate measures of the precision of a standard measurement method
- GB/T 10628Gas analysis -- Comparison methods for determining and checking the composition of calibration gas mixtures
- GB/T 10628-2008Gas analysis -- Comparison methods for determining and checking the composition of calibration gas mixtures
- GB/T 27418-2017Guide to the evaluation and expression of uncertainty in measurement
ISO 5725 · ISO 6143.2001
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Related Standards
GB/T 10628-1989 — Gas analysis - Determination of composition of calibration gas mixtures - Comparison methods
GB/T 10628-2008 — Gas analysis -- Comparison methods for determining and checking the composition of calibration gas mixtures
GB/T 27418-2017 — Guide to the evaluation and expression of uncertainty in measurement
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