1.1 本测试方法包括一个程序 3. 用于快速测定中间馏分燃料（包括船用燃料、汽车燃料、加热燃料和燃气轮机燃料，如规范中规定的燃料）中的苯并萘 第396页 , 1975年 , 2006年 和 880年 。苯醌和苯醌会影响燃料的潜在不稳定性，导致储存过程中的燃料降解产物，这可能会导致性能问题。 1.2 该测试方法适用于从炼油厂到最终用户的分销链中所有点的染色燃料和未染色燃料。它不适用于含有残余油的燃料。便携式仪器允许在现场或实验室进行整个测试，并且不需要加热测试样品。 1.3 该测试方法适用于测试相对吸光度高达5.00吸光度单位（AU）的样品。 注1: 测试方法的精密度是根据最高1.00 AU的相对吸光度确定的。如果相对吸光度高于1.00 AU，则精密度可能不适用。 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）。本标准的使用者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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 储存稳定性取决于复杂的相互作用。它因原料类型、来源和所用加工工艺而异。降解速率可能不会随温度均匀变化。化学反应可能导致颜色变化，随后形成可溶性胶质和不溶性沉积物。不溶性沉积物可能会使过滤器过载，堵塞喷嘴和喷射器。 5.2 该测试方法不需要加热试样，使用便携式仪器，允许在现场或实验室进行测试，以在35分钟内得出结果 最小值。 5.3 本试验方法可能无法识别燃料中稳定性添加剂的潜在有益影响。 因此，这些测试结果可能无法正确地指示含稳定性添加剂的中间馏分燃料的实际储存稳定性。 5.4 本试验方法检测到的不稳定反应性化合物（苯并萘和苯并萘）可能存在于含有催化裂化或直馏材料的燃料中，并可能影响燃料的潜在不稳定性。 5.5 如果任何一方使用该试验方法快速评估稳定性，则相关方有责任决定该程序是否产生有意义的结果。 5.6 结果解释以及与其他测试方法的相关性见 附录X1 .

1.1 This test method covers a procedure 3 for the rapid determination of phenalenes and phenalenones in middle distillate fuels, including marine, automotive, heating, and gas turbine fuel such as those specified in Specifications D396 , D975 , D2069 , and D2880 . Phenalenes and phenalenones affect the potential instability of fuels, leading to fuel degradation products during storage, which may cause performance problems. 1.2 This test method is applicable to both dyed and undyed fuels at all points in the distribution chain from refinery to end-user. It is not applicable to fuels containing residual oil. The portable apparatus allows the whole test to be conducted on site or in a laboratory and does not require the test sample to be heated. 1.3 This test method is suitable for testing samples with a relative absorbance of up to 5.00 absorbance units (AU). Note 1: The precision of the test method has been established on relative absorbance up to 1.00 AU. For relative absorbance above 1.00 AU the precision may not apply. 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 Storage stability depends on complex interactions. It varies with feedstock type and source, and the processing used. The rate of degradation may not change uniformly with temperature. Chemical reactions may lead to a change in color followed by the formation of soluble gums and insoluble sediments. Insoluble sediments may overload filters, and plug nozzles and injectors. 5.2 This test method, which does not require the test sample to be heated, uses a portable apparatus and allows tests to be carried out on site or in the laboratory to give a result within 35 min. 5.3 The potential beneficial effects of stability additives in fuels may not be recognized by this test method. Therefore, the actual storage stability of middle distillate fuels with stability additives may not be correctly indicated by these test results. 5.4 The unstable reactive compounds (phenalenes and phenalenones) detected by this test method may be present in fuels containing catalytically cracked or straight run materials and can affect the potential instability of the fuel. 5.5 If this test method is used by any party for a rapid assessment of stability, it is the responsibility of parties concerned to decide whether or not this procedure yields meaningful results. 5.6 Interpretation of results and correlation with other test methods is given in Appendix X1 .