1.1 本试验方法包括测定航空燃料的现有胶质含量，以及成品汽油或其他挥发性馏出物的胶质含量（包括那些含有酒精和醚类氧化物和沉积物控制添加剂的物质，见 附注7 更多信息）。 1.2 规定了非航空燃料残渣中庚烷不溶部分的测定。 1.3 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。 1.3.1 公认的国际单位制压力单位为帕斯卡（Pa）；公认的国际单位制温度单位为摄氏度。 1.4 警告 -许多监管机构已将汞指定为一种危险物质，可导致严重的医疗问题。汞或其蒸汽已被证明对健康有害，并对材料具有腐蚀性。 处理汞和含汞产品时要小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。当地或国家法律禁止销售汞或含汞产品，或两者兼有。用户必须确定其所在地销售的合法性。 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。 有关特定警告声明，请参阅 6.4 , 7.4 和 9.1 . 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 这种测定车用汽油中胶质的试验方法的真正意义尚未确定。已经证明，高口香糖会导致进气系统沉积和进气门粘滞，在大多数情况下，可以假设低口香糖会确保进气系统不存在困难。然而，用户应认识到，测试方法本身与感应系统沉积物无关。适用于车用汽油的试验方法的主要目的是测量在试验程序相对温和的条件之前或期间样品中形成的氧化产物。由于许多车用汽油是故意与不挥发油或添加剂混合的，因此有必要进行庚烷萃取步骤，以从蒸发残渣中去除这些物质，从而确定有害物质，即胶质。 就航空涡轮机燃料而言，大量胶质表明燃料受到高沸点油或颗粒物的污染，通常反映出炼油厂下游配送过程中处理不当。

1.1 This test method covers the determination of the existent gum content of aviation fuels, and the gum content of motor gasolines or other volatile distillates in their finished form, (including those containing alcohol and ether type oxygenates and deposit control additives—see Note 7 for additional information) at the time of test. 1.2 Provisions are made for the determination of the heptane insoluble portion of the residue of non-aviation fuels. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3.1 The accepted SI unit of pressure is the Pascal (Pa); the accepted SI unit for temperature is degrees Celsius. 1.4 WARNING —Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location. 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. For specific warning statements, see 6.4 , 7.4 , and 9.1 . 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 The true significance of this test method for determining gum in motor gasoline is not firmly established. It has been proved that high gum can cause induction-system deposits and sticking of intake valves, and in most instances, it can be assumed that low gum will ensure absence of induction-system difficulties. The user should, however, realize that the test method is not of itself correlative to induction-system deposits. The primary purpose of the test method, as applied to motor gasoline, is the measurement of the oxidation products formed in the sample prior to or during the comparatively mild conditions of the test procedure. Since many motor gasolines are purposely blended with nonvolatile oils or additives, the heptane extraction step is necessary to remove these from the evaporation residue so that the deleterious material, gum, may be determined. With respect to aviation turbine fuels, large quantities of gum are indicative of contamination of fuel by higher boiling oils or particulate matter and generally reflect poor handling practices in distribution downstream of the refinery.