1.1 本试验方法主要用于以重量法测定用作燃料电池或内燃机动力车辆燃料的氢气中的颗粒浓度。本试验方法描述了获得满足SAE J2719或ISO 14687要求的已知质量数据所需的操作和质量控制程序。只要满足用户的数据质量目标，该测试方法可应用于需要测定颗粒物的其他气体样品。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 诸如质子交换膜燃料电池（PEMFC）的低操作温度燃料电池需要高纯度氢气以获得最大的材料性能和寿命。测量氢气中的颗粒物对于确保原料气具有足够的纯度以满足SAE J2719中定义的燃料电池和内燃系统的需要是必要的。燃料电池电动汽车（FCEV）和气态氢动力内燃发动机车辆的氢燃料中的颗粒物可能会对气动控制部件（如阀门）或其他关键系统部件产生不利影响。 因此，氢燃料中的颗粒浓度应按照ISO 14687、SAE J2719或其他氢燃料质量规范的规定进行限制。 5.2 尽管不适用于氢燃料以外的气体，但本试验方法中的技术可适用于需要测定颗粒浓度的气体样品。

1.1 This test method is primarily intended for gravimetric determination of particulate concentration in hydrogen intended as a fuel for fuel cell or internal combustion engine powered vehicles. This test method describes operating and quality control procedures required to obtain data of known quality satisfying the requirements of either SAE J2719 or ISO 14687. This test method can be applied to other gaseous samples requiring determination of particulates provided the user’s data quality objectives are satisfied. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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 proton exchange membrane fuel cells (PEMFCs) require high purity hydrogen for maximum material performance and lifetime. Measurement of particulates in hydrogen is necessary for assuring a feed gas of sufficient purity to satisfy fuel cell and internal combustion system needs as defined in SAE J2719. The particulates in hydrogen fuel for fuel cell electric vehicles (FCEV) and gaseous hydrogen powered internal combustion engine vehicles may adversely affect pneumatic control components, such as valves, or other critical system components. Therefore, the concentration of particulates in the hydrogen fuel should be limited as specified by ISO 14687, SAE J2719, or other hydrogen fuel quality specifications. 5.2 Although not intended for application to gases other than hydrogen fuel, techniques within this test method can be applied to gas samples requiring determination of particulate concentration.