1.1 本试验方法涵盖了一个程序，用于评估航空涡轮燃料在通过水凝聚过滤器时释放夹带水和乳化水的能力。 1.2 结果表示为水分离指数（WSI）。 1.3 以国际单位制表示的数值应视为标准值。 1.3.1 例外情况- 包括WSI中的单元。 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。 1.5 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 本试验方法提供了航空燃料中存在表面活性剂的指示。类似试验方法 D2550 , D3602 , D3948 和 D7224 ，该测试方法可以检测炼油厂处理生产的燃料残渣的遗留痕迹。此外，这些测试方法可以检测在从生产点到使用点的搬运过程中添加到燃料中或被燃料吸收的表面活性物质。某些添加剂会影响WSI。其中一些物质会影响过滤分离器从燃油中分离游离水的能力。 5.2 小型水分离测试仪的测量范围为0.0 WSI至100.0 WSI。 注1: WSI值大于100.0 WSI可能是由透光率降低引起的（参见 A1.1.5 )由于在测试过程中移除了材料，导致测试样本的损坏。 5.3 该测试方法的开发是为了使炼油厂、燃料终端操作员、管道和独立测试实验室人员能够快速准确地测量表面活性剂的存在，只需最少的培训，就可以在广泛的地点进行。

1.1 This test method covers a procedure to rate the ability of aviation turbine fuels to release entrained and emulsified water when passed through a water-coalescing filter. 1.2 Results are expressed as a Water Separation Index (WSI). 1.3 The values stated in SI units are to be regarded as standard. 1.3.1 Exception— Units in WSI are included. 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 This test method provides an indication of the presence of surfactants in aviation fuel. Like Test Methods D2550 , D3602 , D3948 , and D7224 , this test method can detect carryover traces of refinery treating residues in fuel as produced. In addition, these test methods can detect surface active substances added to or picked up by the fuel during handling from point of production to point of use. Certain additives can affect the WSI. Some of these substances affect the ability of filter separators to separate free water from the fuel. 5.2 The small scale water separation tester has a measurement range from 0.0 WSI to 100.0 WSI. Note 1: WSI values greater than 100.0 WSI can be caused by a reduction in the light transmittance (see A1.1.5 ) of the test specimen due to material that was removed during the testing process. 5.3 This test method was developed so refiners, fuel terminal operators, pipelines, and independent testing laboratory personnel can rapidly and precisely measure for the presence of surfactants, with a minimum of training, in a wide range of locations.