1.1 本试验方法包括使用低分辨率脉冲核磁共振（NMR）光谱仪测定中间馏分石油产品的氢含量。试验方法涵盖的馏分油沸腾范围为150 °C至390 °C。虽然本试验方法可能适用于该沸腾范围以外的中间馏分，但在这种情况下，精度声明可能不适用。测试方法通常基于测试方法 D3701 和 D4808 一个主要区别是使用脉冲核磁共振光谱仪而不是连续波核磁共振光谱仪。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.2.1 首选单位为质量 %. 1.3 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。 1.4 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 氢含量代表了石油馏出物的基本质量，与该产品的许多性能特征相关。 燃气轮机燃料的燃烧特性主要与氢含量有关。随着这些燃料中氢含量的降低，烟尘沉积、废气和热辐射增加。烟灰沉积和热辐射会增加到燃烧室衬里烧坏的程度。氢含量是以下军用燃料的采购要求:MIL-DTL-5624中规定的JP-5、MIL-DTL-83133中规定的JP-8和MIL-DTL-16884中规定的海军馏出燃料。 5.2 该试验方法为现有试验方法提供了一种简单而精确的替代方法( D3701 , D4808 和 D5291 )用于测定石油馏分产品中的氢含量。

1.1 This test method covers the determination of the hydrogen content of middle distillate petroleum products using a low-resolution pulsed nuclear magnetic resonance (NMR) spectrometer. The boiling range of distillates covered by the test method is 150 °C to 390 °C. While this test method may be applicable to middle distillates outside this boiling range, in such cases the precision statements may not apply. The test method is generally based on Test Methods D3701 and D4808 , with a major difference being the use of a pulsed NMR spectrometer instead of a continuous wave NMR spectrometer. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 The preferred units are mass %. 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 Hydrogen content represents a fundamental quality of a petroleum distillate that has been correlated with many of the performance characteristics of that product. Combustion properties of gas turbine fuels are related primarily to hydrogen content. As hydrogen content of these fuels decreases, soot deposits, exhaust smoke, and thermal radiation increase. Soot deposits and thermal radiation can increase to the point that combustor liner burnout will occur. Hydrogen content is a procurement requirement of the following military fuels: JP-5 specified in MIL-DTL-5624, JP-8 specified in MIL-DTL-83133, and Naval Distillate Fuel specified in MIL-DTL-16884. 5.2 This test method provides a simple and precise alternative to existing test methods ( D3701 , D4808 , and D5291 ) for determining the hydrogen content of petroleum distillate products.