1.1 本试验方法包括测定火花点火发动机燃料及其包含含氧混合物（MTBE、ETBE、乙醇等）的混合物的单个碳氢化合物成分，沸点范围高达225 °C.也可以分析炼油操作中通常遇到的其他轻液态烃混合物，例如混合原料（石脑油、重整油、烷基化物等）；然而，仅使用混合火花点火发动机燃料获得统计数据。 1.2 基于合作研究结果，单个组分浓度和精度在0.01范围内确定 % 质量约为30%。该程序可适用于单个成分的较高和较低浓度；但是，如果该程序用于浓度超过规定范围的成分，则用户必须验证其准确性。 1.3 本试验方法还测定了火花点火发动机燃料中浓度范围为1.5%的甲醇、乙醇、叔丁醇、甲基叔丁基醚（MTBE）、乙基叔丁基醚（ETBE）、甲基叔戊基醚（TAME） % 质量为30 % 大量然而，合作研究数据仅为MTBE提供了足够的统计数据。 1.4 虽然确定了存在的大多数单个碳氢化合物，但遇到了一些化合物的共洗脱。如果使用该试验方法估计散装烃族类型组成（PONA），则应提醒此类数据的用户，由于共洗脱和缺乏对所有存在组分的识别，将遇到一些错误。含有大量烯烃或环烷（例如，未净化石脑油）或两者的样品，上述成分 n -辛烷值可能反映PONA类型分组中的重大错误。基于实验室间合作研究中的汽油样品，该程序适用于含量低于25的样品 % 烯烃的质量。 然而，C以上烯烃的一些干扰共分解 7. 这是可能的，尤其是如果对混合组分或其较高沸点馏分（如来自流化催化裂化（FCC）的组分）进行分析，并且总烯烃含量可能不准确。使用本试验方法分析无烯烃样品时也应小心，因为一些石蜡可能被报告为烯烃，因为分析纯粹基于洗脱成分的保留时间。 1.4.1 样品中的总烯烃可通过试验方法获得或确认，或在必要时同时获得或确认 D1319号 （体积百分比）或其他试验方法，例如基于A型仪器的试验方法（试验方法 D6839 ). 1.5 如果存在或怀疑存在水，如果需要，可以使用试验方法测定其浓度 D1744 ，或同等产品。也可能存在含有氧、硫、氮等的其他化合物，并且可能与其他化合物共存在- 用碳氢化合物洗脱。如果需要测定这些特定化合物，建议使用这些特定材料的测试方法，例如测试方法 D4815 和 D5599 用于氧化物，以及 D5623 对于硫化合物或等效物。 1.6 附件A1 本试验方法的第1部分将试验程序的结果与选定组分（包括烯烃）的其他试验方法进行比较，并对几个实验室间合作研究样品的几种组类型进行比较。虽然测定了苯、甲苯和几种氧化物，但当对这些成分的分析结果有疑问时，可以使用特定的测试方法进行验证性分析。 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 了解汽油燃料和混合油的特定单个组分组成（形态）有助于炼油厂质量控制和产品规范。许多单个碳氢化合物的过程控制和产品规范符合性可通过使用本试验方法来确定。

1.1 This test method covers the determination of individual hydrocarbon components of spark-ignition engine fuels and their mixtures containing oxygenate blends (MTBE, ETBE, ethanol, and so forth) with boiling ranges up to 225 °C. Other light liquid hydrocarbon mixtures typically encountered in petroleum refining operations, such as blending stocks (naphthas, reformates, alkylates, and so forth) may also be analyzed; however, statistical data was obtained only with blended spark-ignition engine fuels. 1.2 Based on the cooperative study results, individual component concentrations and precision are determined in the range of 0.01 % mass to approximately 30 % mass. The procedure may be applicable to higher and lower concentrations for the individual components; however, the user must verify the accuracy if the procedure is used for components with concentrations outside the specified ranges. 1.3 The test method also determines methanol, ethanol, t-butanol, methyl t-butyl ether (MTBE), ethyl t-butyl ether (ETBE), t-amyl methyl ether (TAME) in spark ignition engine fuels in the concentration range of 1 % mass to 30 % mass. However, the cooperative study data provided sufficient statistical data for MTBE only. 1.4 Although a majority of the individual hydrocarbons present are determined, some co-elution of compounds is encountered. If this test method is utilized to estimate bulk hydrocarbon group-type composition (PONA) the user of such data should be cautioned that some error will be encountered due to co-elution and a lack of identification of all components present. Samples containing significant amounts of olefinic or naphthenic (for example, virgin naphthas), or both, constituents above n -octane may reflect significant errors in PONA type groupings. Based on the gasoline samples in the interlaboratory cooperative study, this procedure is applicable to samples containing less than 25 % mass of olefins. However, some interfering coelution with the olefins above C 7 is possible, particularly if blending components or their higher boiling cuts such as those derived from fluid catalytic cracking (FCC) are analyzed, and the total olefin content may not be accurate. Caution should also be exercised when analyzing olefin-free samples using this test method as some of the paraffins may be reported as olefins since analysis is based purely on retention times of the eluting components. 1.4.1 Total olefins in the samples may be obtained or confirmed, or both, if necessary, by Test Method D1319 (percent volume) or other test methods, such as those based on multidimensional PONA type of instruments (Test Method D6839 ). 1.5 If water is or is suspected of being present, its concentration may be determined, if desired, by the use of Test Method D1744 , or equivalent. Other compounds containing oxygen, sulfur, nitrogen, and so forth, may also be present, and may co-elute with the hydrocarbons. If determination of these specific compounds is required, it is recommended that test methods for these specific materials be used, such as Test Methods D4815 and D5599 for oxygenates, and D5623 for sulfur compounds, or equivalent. 1.6 Annex A1 of this test method compares results of the test procedure with other test methods for selected components, including olefins, and several group types for several interlaboratory cooperative study samples. Although benzene, toluene, and several oxygenates are determined, when doubtful as to the analytical results of these components, confirmatory analyses can be obtained by using specific test methods. 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 Knowledge of the specified individual component composition (speciation) of gasoline fuels and blending stocks is useful for refinery quality control and product specification. Process control and product specification compliance for many individual hydrocarbons may be determined through the use of this test method.