1.1 这些试验方法包括在规定的实验条件下，使用热重分析法在给定温度下评估固体和液体挥发性的程序。这些测试方法的结果是以单位时间质量表示的波动率获得的。费率 ≥ 使用这些测试方法可以达到5μg/min。 1.2 这些试验方法的典型温度范围为25°C至500°C。该温度范围可能因所用仪器而异。 1.3 这些试验方法旨在通过对单个代表性样品进行热重分析测量，提供样品的挥发性率值。这些试验方法的用户有责任确定满足最终使用要求所需的新鲜样品重复测量的需要和数量。 1.4 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。 1.5 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。 1.6 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 材料的挥发性不是平衡热力学性质，而是与热力学性质（即蒸汽压）相关的材料特性。它受表面积、温度、粒度和吹扫气体流速等因素的影响；也就是说，它是扩散控制的。 5.2 在这些试验方法中，通过0.33 mm至0.38 mm之间的针孔开口实现的样本包容范围允许对温度以外的实验变量相对不敏感的测量环境。通过使用大于0.38 mm的针孔来减小安全壳的范围将增加观察到的质量损失率的幅度，但也将通过增加对其他实验变量变化的敏感性来降低测量精度。 5.3 通过这些试验方法获得的结果并非严格等同于在加工或处理条件下获得的结果，但可用于在此类情况下对材料的挥发性进行排序。因此，由这些测试方法确定的波动率应仅视为指数值。 5.4 挥发性率可用于估计干燥间隔或过程中挥发性释放的程度等可量化值。

1.1 These test methods cover procedures for assessing the volatility of solids and liquids at given temperatures using thermogravimetry under prescribed experimental conditions. Results of these test methods are obtained as volatility rates expressed as mass per unit time. Rates ≥ 5 μg/min are achievable with these test methods. 1.2 Temperatures typical for these test methods are within the range from 25 °C to 500 °C. This temperature range may differ depending upon the instrumentation used. 1.3 These test methods are intended to provide a value for the volatility rate of a sample using a thermogravimetric analysis measurement on a single representative specimen. It is the responsibility of the user of these test methods to determine the need for and the number of repetitive measurements on fresh specimens necessary to satisfy end use requirements. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 Volatility of a material is not an equilibrium thermodynamic property but is a characteristic of a material related to a thermodynamic property that is vapor pressure. It is influenced by such factors as surface area, temperature, particle size, and purge gas flow rate; that is, it is diffusion controlled. 5.2 The extent of containment achieved for specimens in these test methods by means of a pinhole opening between 0.33 mm to 0.38 mm allows for measurement circumstances that are relatively insensitive to experimental variables other than temperature. Decreasing the extent of containment by use of pinholes larger than 0.38 mm will increase the magnitude of the observed rate of mass loss but will also reduce the measurement precision by increasing the sensitivity to variations in other experimental variables. 5.3 Results obtained by these test methods are not strictly equivalent to those experienced in processing or handling conditions but may be used to rank materials for their volatility in such circumstances. Therefore, the volatility rates determined by these test methods should be considered as index values only. 5.4 The volatility rate may be used to estimate such quantifiable values as drying interval or the extent of volatile release from a process.