1.1 本试验方法描述了通过沸点测定法（沸点测量）测定液体蒸气压的程序。它适用于纯液体和常压沸点在285之间的共沸物 K和575 K，它们可以完全冷凝并返回到沸点计锅炉，也就是说，所有材料都必须在全回流下可冷凝。如果液体混合物不含不凝成分，则可对其进行研究。也可以研究含有微量挥发性但完全可冷凝成分的液体混合物，但它们将产生更大不确定性的蒸汽压数据。沸点温度是在1.0的外加压力下测量的 kPa至100 kPa（7.5 托至760托）。 1.2 国际单位制是标准单位。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。 有关具体的危险说明，请参阅第节 8. . 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 蒸汽压是液体的一个基本热力学性质。安全数据表（SDS）、挥发性有机化合物（VOC）的估计以及与产品安全相关的其他需求需要蒸汽压力和沸腾温度数据。蒸汽压对于预测化学物质在环境中的传输是重要的；参见测试方法 E1194 .

1.1 This test method describes procedures for determination of the vapor pressure of liquids by ebulliometry (boiling point measurements). It applies to pure liquids and azeotropes with an atmospheric boiling point between 285 K and 575 K, which can be condensed completely and returned to the ebulliometer boiler, that is, all materials must be condensable at total reflux. Liquid mixtures may be studied if they do not contain non-condensable components. Liquid mixtures that contain trace amounts of volatile but completely condensable components may also be studied, but they will produce vapor pressure data of greater uncertainty. Boiling point temperatures are measured at applied pressures of 1.0 kPa to 100 kPa (7.5 torr to 760 torr). 1.2 SI units are the 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. For specific hazard statements, see Section 8 . 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 Vapor pressure is a fundamental thermodynamic property of a liquid. Vapor pressure and boiling temperature data are required for safety data sheets (SDS), the estimation of volatile organic compounds (VOC), and other needs related to product safety. Vapor pressures are important for prediction of the transport of a chemical in the environment; see Test Method E1194 .