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GB/T 47882-2026Gas analysis — Fourier transform infrared spectroscopy based on comparison methods (English PDF)

气体分析　基于比较测量的傅立叶变换红外光谱法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 2, 2026

Implementation date

February 1, 2027

Scope

GB/T 47882-2026 is the English-translated version of 气体分析　基于比较测量的傅立叶变换红外光谱法.

GB/T 47882-2026 describes how gas components are measured by Fourier transform infrared spectroscopy using the comparison method.

It covers the principle, test conditions, reagents and materials, the measurement system and a dynamic gas dilution device, sampling, the test steps, and the comparison calculation with single-point, two-point and multi-point calibration.

It also deals with precision, detection limit verification, quality assurance and control, and the test report. It applies to gaseous substances containing polar bonds, over a measurement range of 0.01 × 10^-6 to 1 × 10^-2 (mole fraction). Issued on 2 July 2026 and applicable from 1 February 2027.

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Document preview — GB/T 47882-2026

National Standard of the People's Republic of China

ICS: 71.100.20
Classification: G 86

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Test conditions
6 Reagents or materials
6.1 Purge air
6.22 gaseous standard samples (or standard substances)
7.1 Fourier Transform Infrared Spectroscopy Measurement System
7.2 Dynamic Gas Dilution Device
7.3 Calibration Requirements
8 sampling
8.1 General Rules
8.2 Sampling Type
8.3 Sampling System
9 Experimental Steps
9.1 Instrument Power-On Preparation
9.2 Selection of Main Operating Conditions
9.3 Selection of Characteristic Absorption Bands
9.4 Integral of response value
9.5 Measurement of gaseous standard samples (or standard substances) and samples to be tested
9.6 Shutdown
10 Compare legal values
10.1 Single-point calibration
10.2 Two-point calibration
10.3 Multi-point calibration
11 Precision
13 Quality Assurance and Control
14 Test Report
Appendix A (Informative) Examples of Pressure and Temperature Corrections
A.1 Measuring Instruments
A.2 Gas Sample
A.3 Pressure and Temperature Correction Methods
Appendix B (Normative) Slope Two-Point Method Calibration
B.1 Overview of the Two-Point Slope Calibration Method
B.2 Calculation of the slope of the calibration curve
B.3 Evaluation of Expanded Uncertainty
Appendix C (Informative) Examples of Detection Limit Evaluation and Precision Measurement by Fourier Transform Infrared Spectroscopy
C.1 Instrument Information
C.2 Instrument Parameter Settings
C.3 Detection limit
C.4 Precision
Appendix D (Informative) Procedure for Confirming Detection Limits
Appendix E (Informative) Typical Background Single-Beam Spectrum
Reference

Foreword

Drafting.

1 Scope

This document describes the principle, experimental conditions, reagents or materials, and instruments for determining the content of gas components using Fourier transform infrared spectroscopy.

Equipment, sampling, test procedures, comparative legal values, precision, detection limit verification, quality control and assurance, test reports, etc.

This document applies to the determination of gaseous substances containing polar bonds. Measurement range (mole fraction). 0.01 × 10^-^6 ~ 1 × 10^-².

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies to this document.

GB/T 4842 Pure Argon, High-Purity Argon and Ultra-Purity Argon

GB/T 4844 Pure Helium, High-Purity Helium and Ultra-Purity Helium

GB/T 5275.4 Preparation of Calibration Mixtures by Dynamic Volumetric Method for Gas Analysis - Part 4: Continuous Injection Method

GB/T 5275.5 Gas analysis - Preparation of calibration mixed gases by dynamic volumetric method - Part 5: Capillary calibrators

GB/T 5275.6 Gas analysis - Dynamic methods for preparing calibration mixed gases - Part 6: Critical flow through sharp orifices

GB/T 5275.7 Gas analysis - Dynamic methods for preparing calibration mixed gases - Part 7: Thermal mass flow controllers

GB/T 5275.8 Gas analysis - Preparation of calibration mixtures by dynamic volumetric method - Part 8: Diffusion method

GB/T 5275.9 Gas analysis - Preparation of calibration mixed gases by dynamic volumetric method - Part 9: Saturation method

GB/T 5275.10 Gas analysis - Preparation of calibration mixed gases by dynamic volumetric method - Part 10: Permeation method

GB/T 5275.11 Gas analysis - Preparation of calibration mixed gases by dynamic volumetric method - Part 11: Electrochemical generation method

GB/T 6379 (all parts) Accuracy (correctness and precision) of measurement methods and results

GB/T 8979 Pure Nitrogen, High-Purity Nitrogen and Ultra-Purity Nitrogen

GB/T 10628 Gas Analysis Calibration - Determination and Verification Comparison Method of Mixture Composition

GB/T 14850 Glossary of Gas Analysis

GB/T 21186 Fourier Transform Infrared Spectrometer

GB/T 27417 Guidelines for Conformity Assessment of Chemical Analysis Methods

GB/T 33360 Guidelines for Gas Purification Techniques for Trace Analysis in Gas Analysis

GB/T 35861 General quality requirements and metrological traceability of mixed gases for gas analysis calibration

GB/T 38527 General Technical Rules for Calibration of Mixed Gases

GB/T 43306 Sampling Guidelines for Gas Analysis

GB/T 45133 Gas Analysis - Determination of Composition of Gas Mixtures - Comparative Method Based on Single-Point and Two-Point Calibration

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 6379

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