1.1 本试验方法包括甲醇、乙醇、， tert公司 -甲基丁醇 tert公司 -乙基丁基醚（MTBE） tert公司 -丁基醚（ETBE）， tert公司 -通过红外光谱法测定汽油中的戊基甲醚（TAME）和二异丙基醚（DIPE）。该试验方法适用于测定1.7中的甲醇 % 至5.5 % 以质量计，来自1.5的乙醇 % 至10 % 按质量计算， tert公司 -来自1.6的丁醇 % 至12 % 按质量，从1.2开始下降 % 至17 % 按质量，MTBE从2.0开始 % 至16.4 % 按质量，ETBE从2.0开始 % 至18.5 % 以质量计，从1.5开始驯服 % 至18.5 % 按质量计算。 1.2 本试验方法适用于汽油中单一或多种混合物中的含氧化合物，根据中给出的含氧化合物和质量百分比范围 1.1 . 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。 1.4 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 向汽油中添加醇类和醚，以生产重新配制的低排放汽油。 乙醇和醚也可以添加到汽油中以增加辛烷值。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。驾驶性能、蒸汽压、相分离和蒸发排放是与含氧燃料相关的一些问题。 5.2 该测试方法比当前方法更快、更简单、更便宜、更便于携带。 5.3 本试验方法可用于汽油生产中的质量控制。 5.4 本试验方法不适用于符合联邦法规的试验。 3. 5.5 有时会观察到循环测试中一些样本的假阳性读数。由于在循环赛中仅测试了极端基础汽油，因此无法确定在更大范围的基础汽油中预期的误报频率或幅度。

1.1 This test method covers the determination of methanol, ethanol, tert -butanol, methyl tert -butyl ether (MTBE), ethyl tert -butyl ether (ETBE), tert -amyl methyl ether (TAME), and diisopropyl ether (DIPE) in gasoline by infrared spectroscopy. The test method is suitable for determining methanol from 1.7 % to 5.5 % by mass, ethanol from 1.5 % to 10 % by mass, tert -butanol from 1.6 % to 12 % by mass, DIPE from 1.2 % to 17 % by mass, MTBE from 2.0 % to 16.4 % by mass, ETBE from 2.0 % to 18.5 % by mass, and TAME from 1.5 % to 18.5 % by mass. 1.2 This test method is applicable to oxygenate(s) in gasoline singularly or in multiple mixtures hereof according to the oxygenates and mass percent ranges given in 1.1 . 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 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 Alcohols and ethers are added to gasoline to produce a reformulated lower emissions gasoline. Alcohols and ethers may also be added to gasoline to increase the octane number. Type and concentration of various oxygenates are specified and regulated to ensure acceptable commercial gasoline quality. Driveability, vapor pressure, phase separation, and evaporative emissions are some of the concerns associated with oxygenated fuels. 5.2 This test method is faster, simpler, less expensive and more portable than current methods. 5.3 This test method may be applicable for quality control in the production of gasoline. 5.4 This test method is not suitable for testing for compliance with federal regulations. 3 5.5 False positive readings for some of the samples tested in the round robin were sometimes observed. As only extreme base gasolines were tested in the round robin, no definitive statement can be made as to the expected frequency or magnitude of false positives expected in a wider range of base gasolines.