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    ASTM D7941 / D7941M - 14 Standard Test Method for Hydrogen Purity Analysis Using a Continuous Wave Cavity Ring-Down Spectroscopy Analyzer

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    D4150 Terminology Relating to Gaseous Fuels

    D5287 Practice for Automatic Sampling of Gaseous Fuels

    D7265 Specification for Hydrogen Thermophysical Property Tables

    D7606 Practice for Sampling of High Pressure Hydrogen and Related Fuel Cell Feed Gases

    D7649 Test Method for Determination of Trace Carbon Dioxide, Argon, Nitrogen, Oxygen and Water in Hydrogen Fuel by Jet Pulse Injection and Gas Chromatography/Mass Spectrometer Analysis

    D7653 Test Method for Determination of Trace Gaseous Contaminants in Hydrogen Fuel by Fourier Transform Infrared (FTIR) Spectroscopy