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使用真空紫外吸收光谱检测及气相色谱法测定汽车火花点火发动机燃料中烃组类型、精选碳氢化合物和含氧化合物的方法

标准编号: ASTM D8071-2017
标准名称: 使用真空紫外吸收光谱检测及气相色谱法测定汽车火花点火发动机燃料中烃组类型、精选碳氢化合物和含氧化合物的方法
英文名称: Standard Test Method for Determination of Hydrocarbon Group Types and Select Hydrocarbon and Oxygenate Compounds in Automotive Spark-Ignition Engine Fuel Using Gas Chromatography with Vacuum Ultraviolet Absorption Spectroscopy Detection (GC-VUV)
实施时间:
范围: 1.1 This test method is a standard procedure for the determination of paraffins, isoparaffins, olefins, naphthenes, aromatics, ethanol, and methanol in automotive spark-ignition engine fuels using gas chromatography and vacuum ultraviolet detection (GC-VUV). 1.2 Concentrations of compound classes and certain individual compounds are determined by percent mass or percent volume. 1.2.1 The method is developed for testing automotive spark-ignition engine fuels having concentrations of approximately 6 % to 17 % by mass paraffins, 24 % to 70 % by mass isoparaffins, 0.1 % to 16 % by mass olefins, 1 % to 14 % by mass naphthenes, and 16 % to 58 % by mass aromatics. Pending confirmation by a full interlaboratory study, the method is projected to be applicable to a wider range of concentrations and matrices. Temporary repeatability has been determined on a limited subset of samples given in 17.1. 1.3 Individual aromatic components and groups of aromatics greater than 0.01 % by mass are determined. 1.3.1 The method is developed for testing automotive spark-ignition engine fuels having concentrations of 0.08 % to 2.2 % by mass benzene, 1.7 % to 15 % by mass toluene, 0.3 % to 3 % by mass ethylbenzene, 1.5 % to 17 % by mass total xylenes, 0.06 % to 0.6 % by mass naphthalene, and 0.06 % to 1.1 % by mass total methylnaphthalenes. Pending confirmation by a full interlaboratory study, the method is projected to be applicable to a wider range of concentrations and matrices. Temporary repeatability has been determined on a limited subset of samples given in Table 8. 1.4 Isooctane (2,2,4-trimethylpentane) content is determined in the range 0.1 % by mass to 22 % by mass. 1.5 Ethanol and methanol may be determined by this test method. Ethanol is determined in the range of 0.1 % by
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