GB/T 44244-2024 Hydrogen for proton exchange membrane fuel cell vehicles - Determination of carbon monoxide and carbon dioxide - Gas chromatography method
Warning: Hydrogen is a flammable and explosive gas. This document does not cover all safety issues related to its application. Before using this document, users are responsible for formulating corresponding safety and protective measures, clarifying its limited scope of application, and ensuring compliance with relevant national laws, regulations, and mandatory national standards.
1 Scope
This document describes the principle, reagents and materials, instruments and apparatus, test procedures, test data processing, precision and accuracy, quality assurance and control, and test report for the determination of carbon monoxide and carbon dioxide content in hydrogen for proton exchange membrane fuel cell vehicles using gas chromatography method with a helium ionization detector.
This document is applicable to the determination of carbon monoxide and carbon dioxide content in hydrogen for proton exchange membrane fuel cell vehicles. For the determination of carbon monoxide and carbon dioxide content in hydrogen for other purposes within the range specified in this document, reference may be made to this document.
The determination range for both carbon monoxide and carbon dioxide is 0.05μmol/mol~10.0μmol/mol.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 43306 Gas analysis - Sampling guidelines
GB/T 44262 Technical requirements for sampling of hydrogen for proton exchange membrane fuel cell vehicles
JJF 1342 General requirements for the competence of reference material producers
3 Terms and definitions
No terms and definitions are listed in this document.
4 Principle
The sample is introduced into a gas chromatograph equipped with three valves and three columns. By adjusting the opening and closing times of the three six-port valves, the direction of the carrier gas flowing through the chromatographic columns can be changed at different time points. This allows the bulk of hydrogen in the sample to be vented through the first chromatographic column, carbon dioxide to be separated by the second chromatographic column and detected by a helium ionization detector, and carbon monoxide to be separated by the third chromatographic column and detected by a helium ionization detector. External standard method is used for quantification.
Contents
Foreword III
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Instruments and apparatus
7 Test procedures
8 Test data processing
9 Precision and accuracy
10 Quality assurance and control
11 Test report
Annex A (Informative) Gas flow path and operating conditions of typical gas chromatograph
Annex B (Informative) Typical values of precision
Bibliography
