GB/T 44238-2024 Hydrogen for proton exchange membrane fuel cell vehicles—Determination of helium,argon,nitrogen and total hydrocarbons—Gas chromatography method

Scope

This document describes the principle, reagents and materials, instruments and equipment, samples, experimental procedures, data processing, precision and accuracy, quality assurance and control, and test reports for determining the contents of helium, argon, nitrogen, and hydrocarbons in hydrogen used in proton exchange membrane fuel cell vehicles by gas chromatography with a thermal conductivity detector/flame ionization detector. This document is applicable to the determination of the contents of helium, argon, nitrogen, and hydrocarbons in hydrogen used in proton exchange membrane fuel cell vehicles. For other purposes, the determination of the contents of helium, argon, nitrogen, and hydrocarbons in hydrogen within the ranges specified in this document shall be carried out in accordance with the provisions herein. The measurement ranges for various components in this document are as follows: - Helium: 10.0 μmol/mol to 600.0 μmol/mol - Argon: 5.0 μmol/mol to 300.0 μmol/mol - Nitrogen: 5.0 μmol/mol to 300.0 μmol/mol - Methane (C1): 0.10 μmol/mol to 200.0 μmol/mol - Hydrocarbons (C2–C6) and toluene: 0.10 μmol/mol to 2.0 μmol/mol Note: In this document, "hydrocarbons" refer to hydrocarbon compounds that may be present in hydrogen, including alkanes, alkenes, alkynes, and aromatic hydrocarbons.

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