1.1 本试验方法包括通过多维气相色谱法定量测定火花点火发动机燃料中的饱和烃、烯烃、芳烃和氧化物。每种碳氢化合物类型都可以通过碳数报告（参见 注1 )或作为总数。 注1: C之间可能存在重叠 9 和C 10 芳烃；然而，总数是准确的。异丙苯从C 8. 芳烃和其他C 9 芳烃。 1.2 本试验方法不用于测定除苯外的单个碳氢化合物成分。 1.3 本试验方法分为两部分，A部分和B部分。 1.3.1 A部分适用于精度（表 9） 得到的芳烃总体积分数高达50%； 烯烃的总体积分数约为1.5%-30%；氧化物的体积分数，从0.8%到15%；氧的总质量分数约为1.5%至3.7%；苯的体积分数高达2%。虽然该试验方法可用于测定高达50%体积分数的较高烯烃含量，但烯烃的精度仅在约1.5%体积分数至约30%体积分数的范围内进行测试。该方法还针对乙醚含量高达22%的情况进行了测试 % 体积分数，但尚未确定精度数据。 1.3.1.1 本试验方法专门用于分析含有氧化物的车用汽油，但也适用于具有类似沸点范围的其他烃流，如石脑油和重整油。 1.3.2 B部分描述了含氧基团（乙醇、甲醇、醚、C）的分析程序 3. 至C 5. 乙醇体积分数在50%-85%之间的乙醇燃料中的醇（17 % 至29 % 氧气）。在气相色谱分析之前，用不含氧化合物的成分稀释汽油，将乙醇含量降至20%以下。积分中不应考虑稀释溶剂，这使得在归一化至100%后报告未稀释样品的结果成为可能。 1.4 试验方法中规定的氧化物 D4815 已验证不会干扰碳氢化合物。在循环样本集中，测试了以下氧化物:MTBE、乙醇、ETBE、TAME、， iso -丙醇、异丁醇、， tert公司 -丁醇和甲醇。甲醇的推导精度数据不符合本国际标准中的精度计算。本试验方法的适用性也已验证用于测定正丙醇、丙酮和 di公司 -异丙醚（DIPE）。然而，尚未确定这些化合物的精度数据。 1.4.1 其他含氧化合物可以使用测试方法进行测定和量化 D4815 或 D5599 . 1.5 该方法与ISO一致 22854 1.6 本试验方法包括美国EPA火花点火发动机燃料法规中基于实践的总烯烃报告的相对偏差部分 D6708 测试方法之间的准确性评估 D6839 和试验方法 D1319号 作为一种可能的测试方法 D6839 试验方法的替代方案 D1319号 . 实践 D6708 导出的相关方程仅适用于通过试验方法测量的总烯烃浓度范围为0.2%-18.2%（按体积计）的燃料 D6839 . 适用的测试方法 D1319号 根据试验方法的报告，总烯烃的体积百分比范围为0.6%-20.6% D1319号 . 1.7 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。 1.8 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。 1.9 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 了解火花点火发动机燃料成分有助于法规遵从性、过程控制和质量保证。 5.2 火花点火发动机燃料中烯烃和其他碳氢化合物类型的定量测定需要符合政府法规。 5.3 本试验方法不适用于M85燃料，其含有85 % 甲醇。

1.1 This test method covers the quantitative determination of saturates, olefins, aromatics, and oxygenates in spark-ignition engine fuels by multidimensional gas chromatography. Each hydrocarbon type can be reported either by carbon number (see Note 1 ) or as a total. Note 1: There can be an overlap between the C 9 and C 10 aromatics; however, the total is accurate. Isopropyl benzene is resolved from the C 8 aromatics and is included with the other C 9 aromatics. 1.2 This test method is not intended to determine individual hydrocarbon components except benzene. 1.3 This test method is divided into two parts, Part A and Part B. 1.3.1 Part A is applicable to automotive motor gasoline for which precision (Table 9) has been obtained for total volume fraction of aromatics of up to 50 %; a total volume fraction of olefins from about 1.5 % up to 30 %; a volume fraction of oxygenates, from 0.8 % up to 15 %; a total mass fraction of oxygen from about 1.5 % to about 3.7 %; and a volume fraction of benzene of up to 2 %. Although this test method can be used to determine higher-olefin contents of up to 50 % volume fraction, the precision for olefins was tested only in the range from about 1.5 % volume fraction to about 30 % volume fraction. The method has also been tested for an ether content up to 22 % volume fraction but no precision data has been determined. 1.3.1.1 This test method is specifically developed for the analysis of automotive motor gasoline that contains oxygenates, but it also applies to other hydrocarbon streams having similar boiling ranges, such as naphthas and reformates. 1.3.2 Part B describes the procedure for the analysis of oxygenated groups (ethanol, methanol, ethers, C 3 to C 5 alcohols) in ethanol fuels containing an ethanol volume fraction between 50 % and 85 % (17 % to 29 % oxygen). The gasoline is diluted with an oxygenate-free component to lower the ethanol content to a value below 20 % before the analysis by GC. The diluting solvent should not be considered in the integration, this makes it possible to report the results of the undiluted sample after normalization to 100 %. 1.4 Oxygenates as specified in Test Method D4815 have been verified not to interfere with hydrocarbons. Within the round robin sample set, the following oxygenates have been tested: MTBE, ethanol, ETBE, TAME, iso -propanol, isobutanol, tert -butanol and methanol. The derived precision data for methanol do not comply with the precision calculation as presented in this International Standard. Applicability of this test method has also been verified for the determination of n-propanol, acetone, and di -isopropyl ether (DIPE). However, no precision data have been determined for these compounds. 1.4.1 Other oxygenates can be determined and quantified using Test Method D4815 or D5599 . 1.5 The method is harmonized with ISO 22854. 1.6 This test method includes a relative bias section for U.S. EPA spark-ignition engine fuel regulations for total olefins reporting based on Practice D6708 accuracy assessment between Test Method D6839 and Test Method D1319 as a possible Test Method D6839 alternative to Test Method D1319 . The Practice D6708 derived correlation equation is only applicable for fuels in the total olefins concentration range from 0.2 % to 18.2 % by volume as measured by Test Method D6839 . The applicable Test Method D1319 range for total olefins is from 0.6 % to 20.6 % by volume as reported by Test Method D1319 . 1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.8 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. 1.9 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 A knowledge of spark-ignition engine fuel composition is useful for regulatory compliance, process control, and quality assurance. 5.2 The quantitative determination of olefins and other hydrocarbon types in spark-ignition engine fuels is required to comply with government regulations. 5.3 This test method is not applicable to M85 fuels, which contain 85 % methanol.