1.1 这些试验方法包括在规定的时间和温度条件下，使用活性炭作为浸渍介质，测定塑料材料的挥发性损失。 1.2 两种测试方法如下: 1.2.1 试验方法A，与活性炭直接接触-- 在这种测试方法中，塑料材料与碳直接接触。这种测试方法在快速比较大量塑性试样时特别有用。 1.2.2 试验方法B，钢丝笼-- 该试验方法规定使用金属丝笼，以防止塑料材料和碳之间的直接接触。 通过消除直接接触，挥发性成分向周围碳的迁移被最小化，并且挥发性损失被更具体地测量。 1.3 以国际单位制表示的数值应视为标准。 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。 注1: 本标准和ISO 176涉及相同的主题，但技术内容不同。 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====== 4.1 试验方法旨在进行快速经验试验，已发现该试验可用于具有相同标称厚度的材料的相对比较。 注2: 当塑料材料含有增塑剂时，塑料的损失被认为主要是增塑剂。 水分的影响被认为是可以忽略的。 4.2 各种塑料材料与最终应用的相关性应由用户确定。

1.1 These test methods cover the determination of volatile loss from a plastic material under defined conditions of time and temperature, using activated carbon as the immersion medium. 1.2 Two test methods are covered as follows: 1.2.1 Test Method A, Direct Contact with Activated Carbon— In this test method the plastic material is in direct contact with the carbon. This test method is particularly useful in the rapid comparison of a large number of plastic specimens. 1.2.2 Test Method B, Wire Cage— This test method prescribes the use of a wire cage, which prevents direct contact between the plastic material and the carbon. By eliminating the direct contact, the migration of the volatile components to the surrounding carbon is minimized and loss by volatilization is more specifically measured. 1.3 The values stated in SI units are to be regarded as the standard. 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. Note 1: This standard and ISO 176 address the same subject matter, but differ in technical content. 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 ====== 4.1 The test methods are intended to be rapid empirical tests which have been found to be useful in the relative comparison of materials having the same nominal thickness. Note 2: When the plastic material contains plasticizer, loss from the plastic is assumed to be primarily plasticizer. The effect of moisture is considered to be negligible. 4.2 Correlation with ultimate application for various plastic materials shall be determined by the user.