1.1 本试验方法包括测定航空汽油和涡轮燃料中水混溶性成分的存在，以及这些成分对体积变化和燃料-水界面的影响。 1.2 以国际单位制表示的数值应视为标准。SI单位后括号中给出的值仅供参考，不被视为标准值。 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。 本标准涉及第节中确定的危险化学品的使用 7. .在使用本标准之前，请参阅供应商的安全标签、材料安全数据表和其他技术文献。 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 当应用于航空汽油时，使用该技术的水反应体积变化揭示了醇等水溶性成分的存在。当应用于航空涡轮燃料时，使用该技术的水反应界面评级在揭示表面活性剂的存在方面是不可靠的，表面活性剂会迅速解除过滤分离器的武装，并允许自由水和颗粒通过；但是可以揭示其他类型的污染物的存在。其他测试，如测试方法 D3948 ，能够检测航空燃料中的表面活性剂。

1.1 This test method covers the determination of the presence of water-miscible components in aviation gasoline and turbine fuels, and the effect of these components on volume change and on the fuel-water interface. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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. This standard involves the use of hazardous chemicals identified in Section 7 . Before using this standard, refer to suppliers' safety labels, Material Safety Data Sheets and other technical literature. 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 When applied to aviation gasoline, water reaction volume change using the technique reveals the presence of water-soluble components such as alcohols. When applied to aviation turbine fuels, water reaction interface rating using the technique is not reliable in revealing the presence of surfactants which disarm filter-separators quickly and allow free water and particulates to pass; but can reveal the presence of other types of contaminants. Other tests, such as Test Method D3948 , are capable of detecting surfactants in aviation fuels.