1.1 本试验方法描述了通过在不同施加压力下使用差热分析（DTA）或差示扫描量热法（DSC）仪器进行的沸点测量来确定纯液体或熔体蒸气压的程序。 1.2 该试验方法可用于温度范围273 K至773K（0 摄氏度至500度 °C）和0.2 kPa至2MPa。根据使用的仪器和测试材料的热稳定性，这些范围可能不同。由于本试验方法要求施加一定范围的压力，因此最好使用被称为高压差热仪表（HPDSC或HPDTA）的仪表为分析员提供服务。 1.3 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。 （另见 IEEE/ASTM SI 10 .) 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前建立适当的安全、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 蒸汽压是液体的基本热物理性质。蒸汽压力数据在工艺设计和控制、安全搬运和运输环境法规的制定、挥发性有机物含量（VOC）的估算以及危险评估中都很有用。 安全数据表（SDS）需要蒸汽压力和沸腾温度数据。蒸发焓也可根据蒸汽压力曲线的斜率进行估算（见实践 E2071 ).

1.1 This test method describes a procedure for the determination of the vapor pressure of pure liquids or melts from boiling point measurements made using differential thermal analysis (DTA) or differential scanning calorimetry (DSC) instrumentation operated at different applied pressures. 1.2 This test method can be used for the temperature range 273 K to 773 K (0 °C to 500 °C) and for pressures between 0.2 kPa to 2 MPa. These ranges may differ depending upon the instrumentation used and the thermal stability of materials tested. Because a range of applied pressures is required by this test method, the analyst is best served by use of instrumentation referred to as high pressure differential thermal instrumentation (HPDSC or HPDTA). 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. (See also IEEE/ASTM SI 10 .) 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 Vapor pressure is a fundamental thermophysical property of a liquid. Vapor pressure data are useful in process design and control, in establishing environmental regulations for safe handling and transport, for estimation of volatile organic content (VOC), and in deriving hazard assessments. Vapor pressure and boiling temperature data are required for Safety Data Sheets (SDS). The enthalpy of vaporization may also be estimated from the slope of the vapor pressure curve (see Practice E2071 ).