1.1 本试验方法中描述的气相色谱/质谱（GC/MS）程序用于通过测量单个目标卤代烃来确定氢气中总有机卤化物和总非甲烷碳氢化合物（TNMHC）的浓度( 表1 )碳氢化合物（包括甲醛、， 表1 和 表2 )分别为。 1.2 本试验方法中提及的商品名不构成认可或使用建议。可以使用其他制造商的设备或设备型号。 1.3 单位- 以国际单位制表示的数值应视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 质子交换膜燃料电池（PEMFC）等低工作温度燃料电池需要高纯度氢气以实现最佳性能和寿命。有机卤化物和甲醛可以与质子交换膜中的催化剂反应，非甲烷碳氢化合物会降低质子交换膜的堆叠性能。

1.1 The gas chromatography/mass spectrometry (GC/MS) procedure described in this test method is used to determine concentrations of total organic halides and total non-methane hydrocarbons (TNMHC) in hydrogen by measurement of individual target halocarbons ( Table 1 ) and hydrocarbons (including formaldehyde, Table 1 and Table 2 ), respectively. 1.2 Mention of trade names in this test method does not constitute endorsement or recommendation for use. Other manufacturers’ equipment or equipment models can be used. 1.3 Units— The values stated in SI units are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Low operating temperature fuel cells such as PEMFCs require high purity hydrogen for optimal performance and longevity. Organic halides and formaldehyde can react with catalyst in PEMs and non-methane hydrocarbons degrade PEM stack performance.