1.1 这些试验方法包括使用连续波低分辨率核磁共振波谱仪测定从常压蒸馏物到减压渣油的石油产品中的氢含量。（试验方法 D3701 是使用核磁共振光谱测定航空涡轮燃料的氢含量的优选方法。） 1.2 这里包括三种测试方法，它们说明了不同石油产品的特殊特性，并适用于以下蒸馏范围: 试验方法 石油产品 沸腾范围，°C（°F） （近似值） A. 轻质蒸馏物 15–260（60–500） B 中间馏分 200–370（400–700） 瓦斯油 370–510（700–950） C Residua 510+ （950+ ) 1.3 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。优选的单位是质量%。 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。 有关具体的警告声明，请参阅章节 7.2 和 7.4 。 1.5 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 氢含量代表了石油产品的基本质量，与该产品的许多性能特征相关。 5.2 该试验方法为现有试验方法，特别是燃烧技术（试验方法 D5291 )用于测定一系列石油产品的氢含量。

1.1 These test methods cover the determination of the hydrogen content of petroleum products ranging from atmospheric distillates to vacuum residua using a continuous wave, low-resolution nuclear magnetic resonance spectrometer. (Test Method D3701 is the preferred method for determining the hydrogen content of aviation turbine fuels using nuclear magnetic resonance spectroscopy.) 1.2 Three test methods are included here that account for the special characteristics of different petroleum products and apply to the following distillation ranges: Test Method Petroleum Products Boiling Range, °C (°F) (approximate) A Light Distillates 15–260 (60–500) B Middle Distillates 200–370 (400–700) Gas Oils 370–510 (700–950) C Residua 510+ (950+ ) 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. The preferred units are mass %. 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. For specific warning statements, see Sections 7.2 and 7.4 . 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 The hydrogen content represents a fundamental quality of a petroleum product that has been correlated with many of the performance characteristics of that product. 5.2 This test method provides a simple and more precise alternative to existing test methods, specifically combustion techniques (Test Methods D5291 ) for determining the hydrogen content on a range of petroleum products.