Gas analysis—Determination of the contents of trace carbon monoxide, carbon dioxide and hydrocarbon in gases—Gas chromatography with flame ionization detector
GB/T 8984-2025 Gas analysis—Determination of the contents of trace carbon monoxide, carbon dioxide and hydrocarbon in gases—Gas chromatography with flame ionization detector English, Anglais, Englisch, Inglés, えいご
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ICS 71. 100. 20 CCS G 86
GB/T 8984-2025 replaces GB/T 8984-2008
Gas analysis—Determination of the contents of trace carbon monoxide, carbon dioxide, and hydrocarbons in gases—Gas chromatography with flame ionization detector
Issued on 2025-08-29 Implemented on 2026-03-01
Issued by State Administration for Market Regulation Standardization Administration of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Test conditions
6 Reagents and materials
7 Instrumentation
8 Sampling
9 Test procedure
10 Test data processing
Gas analysis—Determination of the contents of trace carbon monoxide, carbon dioxide, and hydrocarbons in gases—Gas chromatography with flame ionization detector
Warning—Personnel using this document shall have practical experience in regular laboratory work. This document does not address all possible safety issues. Users are responsible for implementing appropriate safety and health measures and ensuring compliance with national regulatory requirements.
1 Scope
This document specifies the test conditions, reagents and materials, instrumentation, sampling, test data processing, precision, measurement uncertainty, quality assurance and control, and reporting requirements for the determination of trace carbon monoxide, carbon dioxide, and hydrocarbon contents in gases using gas chromatography with flame ionization detection (GC-FID). It describes the principle and test procedure of the method.
This document is applicable to the determination of trace carbon monoxide, carbon dioxide, and hydrocarbon contents in gases. For trace carbon monoxide and carbon dioxide, the determination range is (0.02–100)×10⁻⁶ (mole fraction); for trace hydrocarbon components, the determination range is (0.01–100)×10⁻⁶ (mole fraction); for trace total hydrocarbons (expressed as methane), the determination range is (0.03–100)×10⁻⁶ (mole fraction). Samples exceeding the determination range may be analyzed by adjusting the test conditions.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the editions cited apply. For undated references, the latest edition (including any amendments) applies.
GB/T 3634. 2 Hydrogen—Part 2: Pure hydrogen, high-purity hydrogen, and ultra-pure hydrogen
GB/T 4842 Argon
GB/T 4844 Pure helium, high-purity helium, and ultra-pure helium
GB/T 4946 Terminology for gas chromatography
GB/T 8170 Rules for rounding off numbers and expression and judgment of limiting values
GB/T 8979 Pure nitrogen, high-purity nitrogen, and ultra-pure nitrogen
GB/T 14599 Pure oxygen, high-purity oxygen, and ultra-pure oxygen
GB/T 14850 Gas analysis—Vocabulary
GB/T 43306 Gas analysis—Sampling guide
3 Terms and definitions
The terms and definitions defined in GB/T 4946, GB/T 14850, and GB/T 43306, and the following terms and definitions, apply to this document.
3.1
hydrocarbon
Gaseous organic compounds that respond to a flame ionization detector.
3.2
total content of hydrocarbons
Sum of the hydrocarbon contents in a gas.
4 Principle
4.1 The contents of trace carbon monoxide, carbon dioxide, and hydrocarbons in gases are determined using gas chromatography with flame ionization detection (GC-FID).
4.2 When determining carbon monoxide and carbon dioxide contents, the sample gas components are first separated by the chromatography column, then sequentially introduced into a methane converter, where carbon monoxide and carbon dioxide are converted into methane, and finally detected by the flame ionization detector (FID). The conversion reactions are as follows:
4.3 When determining hydrocarbon contents, the sample gas components are separated by the chromatography column and then detected by the FID.
4.4 When determining total hydrocarbon contents, the sample gas passes through an empty column, and all components are simultaneously detected by the FID.
4.5 The target components are qualitatively and quantitatively analyzed using the corresponding gas reference samples (or reference materials) based on the retention time and FID response value. Total hydrocarbons are quantitatively analyzed using methane gas reference samples (or reference materials).
