1.1 本试验方法包括通过气相色谱法测定甲醇燃料混合物（包括燃料甲醇（M99））中M10至M99的甲醇含量。 1.1.1 甲醇的测定体积分数为10%-99%。 1.2 本试验方法不仅可测量混合汽油中的甲醇，还可测量燃料甲醇（M99）本身中5 mg/kg至1000 mg/kg范围内的杂质。然而，并非所有杂质都能通过本试验方法进行测量或检测。 1.2.1 水不能通过本试验方法测定，应通过试验方法等程序进行测量 D1364 以及用于校正该试验方法测定的浓度的结果。 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 甲醇与汽油在70%的水平下混合使用 % 至85 % 按规范规定的体积 D5797 . 本试验方法提供了一种定量方法，用于测量甲醇燃料混合物中的甲醇含量，从10 % 至99 % 按体积计算。通常浓度为70 % 至85 % 按体积（M70至M85）。 该方法还用于混合前分析燃料甲醇（M99）。

1.1 This test method covers the determination of the methanol content, by gas chromatography, of M10 to M99 in methanol fuel blends, including fuel methanol (M99). 1.1.1 Methanol may be determined from 10 % to 99 % by volume. 1.2 This test method is designed to measure not only methanol in the blended gasoline but also the impurities in fuel methanol (M99) itself in the range of 5 mg/kg to 1000 mg/kg. However, not all impurities are measured nor detected by this test method. 1.2.1 Water cannot be determined by this test method and shall be measured by a procedure such as Test Method D1364 and the result used to correct the concentrations determined by this test method. 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 Methanol is used in blends with gasoline at levels of 70 % to 85 % by volume, as specified in Specification D5797 . This test method provides a quantitative approach to measure the methanol content in methanol fuel blends, from 10 % to 99 % by volume. The usual concentration is 70 % to 85 % by volume (M70 to M85). The method is also used to analyze fuel methanol (M99) prior to blending.