1.1 本试验方法涵盖了测量航空燃料中二甘醇单甲醚（DiEGME）浓度的技术。用合适的折射计测试用固定比例的水提取的测量体积的燃料，以确定燃料中燃料系统结冰抑制剂（FSII）的浓度。使用各种燃料类型的特定提取比，确定了DiEGME添加剂的精度估计。提取率足够高，可以使用便携式手持折射计，但不会高到牺牲0.01%至0.25%体积范围内的精度或线性，或两者兼而有之。 1.2 DiEGME在规范中有详细描述 D4171 以及其他规格。 1.3 以国际单位制表示的值应被视为标准值。本标准不包括其他计量单位。 1.4 警告 --汞已被许多监管机构指定为可能导致严重医疗问题的危险物质。汞或其蒸气已被证明对健康有害，对材料有腐蚀性。处理汞和含汞产品时请小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。当地或国家法律可能禁止销售汞或含汞产品，或两者兼而有之。用户必须确定其所在地销售的合法性。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。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。 1.6 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 DiEGME与水混溶，在运输和储存过程中通过与水接触可以很容易地从燃料中提取出来。因此，需要方法来检查燃料中的添加剂含量，以确保飞机中的添加剂浓度适当。 5.2 本试验方法适用于现场或实验室进行的分析。

1.1 This test method covers a technique for measuring the concentration of Diethylene Glycol Monomethyl Ether (DiEGME) in aviation fuels. A measured volume of fuel, extracted with a fixed ratio of water, is tested with a suitable refractometer to determine the concentration of fuel system icing inhibitor (FSII) in fuel. Precision estimates have been determined for the DiEGME additive using specific extraction ratios with a wide variety of fuel types. The extraction ratios are high enough that portable handheld refractometers can be used, but not so high as to sacrifice accuracy or linearity, or both, in the 0.01 % to 0.25 % by volume range of interest. 1.2 DiEGME is fully described in Specification D4171 and in other specifications. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. 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 DiEGME is miscible with water and can be readily extracted from the fuel by contact with water during shipping and in storage. Methods are therefore needed to check the additive content in the fuel to ensure proper additive concentration in the aircraft. 5.2 This test method is applicable to analyses performed in the field or in a laboratory.