1.1 本试验方法包括用气相色谱法测定汽油中的醚和醇。测定的特定化合物为甲基 tert公司 -丁基醚（MTBE），乙基 tert公司 -丁基醚（ETBE）， tert公司 -戊甲醚（TAME）、二异丙基醚（DIPE）、甲醇、乙醇、异丙醇、， n -丙醇、异丁醇、， tert公司 -丁醇， 证券交易委员会 -丁醇， n -丁醇，以及 tert公司 -戊醇( tert公司 -淀粉醇）。 1.2 单个醚从0.20确定 % 至20.0 % 按质量计算。单个醇的测定值为0.20 % 至12.0 % 按质量计算。用于转换为质量的方程 氧气百分比和体积比 提供了单个化合物的百分比。 浓度<0.20时 % 就质量而言，碳氢化合物可能会干扰几种醚和醇。报告限制为0.20 % 按质量测试了最多含有10%的汽油 % 按体积计算 烯烃。对于含量大于10的汽油，可能存在以下情况: % 按体积烯烃计，干扰可能大于0.20 % 按质量计算。 附件A1 给出了色谱图，显示了对含有10 % 按体积计的烯烃。 1.3 该测试方法包括美国火花点火发动机燃料中乙醇的相对偏差相关性。 S、 基于实践的EPA法规报告 D6708 测试方法之间的准确性评估 D4815 和试验方法 D5599 作为一种可能的测试方法 D4815 试验方法的替代方案 D5599 . 实践 D6708 导出的相关方程仅适用于通过试验方法测量的浓度范围为2.28%-14.42%（按质量计）的燃料中的乙醇 D4815 . 适用的测试方法 D5599 根据试验方法的报告，乙醇的质量范围为2.16%-14.39% D5599 . 1.4 醇基燃料，如M-85和E-85、MTBE产品、乙醇产品和变性酒精，明确排除在本试验方法之外。 M-85燃料的甲醇含量被认为超出了系统的工作范围。 1.5 苯在检测时，不能使用本试验方法进行量化，应采用替代方法进行分析（见试验方法 D3606 ). 1.6 以国际单位制表示的数值应视为标准值。还提供了常用的替代装置，以提高清晰度，并帮助用户使用本试验方法。 1.7 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。 1.8 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 可以向汽油中添加醚、醇和其他含氧化合物，以增加辛烷值并减少排放。规定和调节各种氧化物的类型和浓度，以确保可接受的商用汽油质量。 可驾驶性、蒸汽压、相分离、排气和蒸发排放是与含氧燃料相关的一些问题。 5.2 本试验方法既适用于汽油生产中的质量控制，也适用于测定故意或外来的氧化物添加或污染。

1.1 This test method covers the determination of ethers and alcohols in gasolines by gas chromatography. Specific compounds determined are methyl tert -butylether (MTBE), ethyl tert -butylether (ETBE), tert -amylmethylether (TAME), diisopropylether (DIPE), methanol, ethanol, isopropanol, n -propanol, isobutanol, tert -butanol, sec -butanol, n -butanol, and tert -pentanol ( tert -amylalcohol). 1.2 Individual ethers are determined from 0.20 % to 20.0 % by mass. Individual alcohols are determined from 0.20 % to 12.0 % by mass. Equations used to convert to mass percent oxygen and to volume percent of individual compounds are provided. At concentrations <0.20 % by mass, it is possible that hydrocarbons may interfere with several ethers and alcohols. The reporting limit of 0.20 % by mass was tested for gasolines containing a maximum of 10 % by volume olefins. It may be possible that for gasolines containing >10 % by volume olefins, the interference may be >0.20 % by mass. Annex A1 gives a chromatogram showing the interference observed with a gasoline containing 10 % by volume olefins. 1.3 This test method includes a relative bias correlation for ethanol in spark-ignition engine fuels for the U.S. EPA regulations reporting based on Practice D6708 accuracy assessment between Test Method D4815 and Test Method D5599 as a possible Test Method D4815 alternative to Test Method D5599 . The Practice D6708 derived correlation equation is only applicable for ethanol in fuels in the concentration range from 2.28 % to 14.42 % by mass as measured by Test Method D4815 . The applicable Test Method D5599 range for ethanol is from 2.16 % to 14.39 % by mass as reported by Test Method D5599 . 1.4 Alcohol-based fuels, such as M-85 and E-85, MTBE product, ethanol product, and denatured alcohol, are specifically excluded from this test method. The methanol content of M-85 fuel is considered beyond the operating range of the system. 1.5 Benzene, while detected, cannot be quantified using this test method and shall be analyzed by alternate methodology (see Test Method D3606 ). 1.6 The values stated in SI units are to be regarded as standard. Alternate units, in common usage, are also provided to increase clarity and aid the users of this test method. 1.7 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. 1.8 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 Ethers, alcohols, and other oxygenates can be added to gasoline to increase octane number and to reduce emissions. Type and concentration of various oxygenates are specified and regulated to ensure acceptable commercial gasoline quality. Drivability, vapor pressure, phase separation, exhaust, and evaporative emissions are some of the concerns associated with oxygenated fuels. 5.2 This test method is applicable to both quality control in the production of gasoline and for the determination of deliberate or extraneous oxygenate additions or contamination.