1.1 本试验方法包括测定以甲基环戊二烯基三羰基锰（MMT）形式存在的总锰含量， 2. 浓度范围为0.25 mg/L至40 mg/L锰。 1.2 本试验方法适用于含12 % 体积甲基叔丁基醚或最多10 % 体积乙醇。本试验方法可能不适用于含18 % 用试验方法测定的烯烃体积 第1319天 （非相关）。 1.3 本试验方法专门用于在推荐浓度范围内测定汽油中的MMT。尚未测试该方法在其他浓度范围、其他材料中MMT的测定或汽油中其他锰化合物的测定中的应用 1.4 以国际单位表示的数值应视为标准。 优选的浓度单位为mg/L锰。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。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。 有关特定的警告声明，请参见章节 6. 和 7. . 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》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 某些有机锰化合物添加到汽油中时起到抗爆剂的作用。本试验方法提供了一种测定汽油样品中此类物质浓度的方法。

1.1 This test method covers the determination of the total manganese content, present as methylcyclopentadienyl manganese tricarbonyl (MMT), 2 of gasoline within the concentration range from 0.25 mg/L to 40 mg/L of manganese. 1.2 This test method is applicable to reformulated gasoline containing up to 12 % volume methyl tertiary butylether or up to 10 % volume ethanol. This test method may not be applicable to highly cracked materials containing greater than 18 % by volume olefins as determined by Test Method D1319 (nondepentanized). 1.3 This test method has been developed and tested specifically for the determination of MMT in gasoline over the recommended concentration range. Application of the method to other concentration ranges, to the determination of MMT in other materials, or to the determination of other manganese compounds in gasoline have not been tested 1.4 The values stated in SI units are to be regarded as the standard. The preferred concentration units are mg/L manganese. 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 Sections 6 and 7 . 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 Certain organo-manganese compounds act as antiknock agents when added to gasoline. This test method provides a means for determining the concentration of such a material in a gasoline sample.