本文件规定了测定车用汽油和乙醇（E85）车用燃料中饱和烃、烯烃和芳香烃的气相色谱（GC）方法。另外，可以测定苯和甲苯含量、含氧化合物和总氧含量。 笔记？1？就本文件而言，术语%？（m/m）和%？（V/V）分别用于表示质量分数w和体积分数φ。 本文件定义了两个程序，A和B。 程序A适用于芳烃总量为19,32？%？(V/V)高达46,29？%？(V/V)；总烯烃从0.40？%？(V/V)高达26,85？%？(V/V)；含氧化合物从0.61？%？（V/V）高达9.85？%？(V/V)；氧气含量从1.50？%？（m/m）到12,32？%？(m/m)；苯含量从0.38？%？(V/V)高达1.98？%？（V/V）和甲苯含量从5,85？%？(V/V)高达31,65？%（V/V）。该方法还针对单个含氧化合物进行了测试。甲醇总体积的精密度为1.05？%？(V/V)高达16,96？%？(V/V)；乙醇的总体积从0.50？%？(V/V)高达17,86？%？(V/V)；MTBE的总体积从0.99？%？(V/V)高达15,70？%？（V/V），ETBE的总体积从0.99？%？(V/V)高达15,49？%？（V/V），TAME的总体积从0,99？%？(V/V)高达5,92？%？(V/V)，TAEE的总体积为0.98？%？(V/V)高达15,59？%？（V/V）。 尽管该测试方法可用于测定高达50？%？（V/V），烯烃的精密度仅在0.40？%？(V/V)至26,85？%？（V/V）。 尽管该测试方法是专门为分析含有含氧化合物的车用汽油而开发的，但也可应用于具有类似沸点范围的其它烃流，例如石脑油和重整物。笔记？2？为了手术？a、本文件的适用性也已被验证用于正丙醇、丙酮和二异丙醚（DIPE）的测定。然而，尚未确定这些化合物的精密度数据。 程序B描述了乙醇（E85）汽车燃料中含氧基团（乙醇、甲醇、醚、C3-C5醇）的分析。%？（V/V）和？85？%？（V/V）。汽油用不含氧成分稀释，使乙醇含量低于20？%？（V/V）GC分析前。 可以完全分析样品，包括烃。稀释样品的精密度数据仅适用于含氧基团。 笔记？3？对于程序B，精密度可用于约50？%高达85？%？（V/V）。乙醚馏分的精密度见表？6可用于至少含有11？%？（V/V）的醚。对于高级醇馏分，获得的数据太少，无法得出完整的精密度声明，数据见表？因此，图6仅是指示性的。 笔记？4？C9和C10芳烃之间可以发生重叠。然而，总数是准确的。异丙基苯从C8芳族化合物中分离出来，并与其它C9芳族化合物一起包含。

This document specifies the gas chromatographic (GC) method for the determination of saturated, olefinic and aromatic hydrocarbons in automotive motor gasoline and ethanol (E85) automotive fuel. Additionally, the benzene and toluene content, oxygenated compounds and the total oxygen content can be determined. NOTE？1？For the purposes of this document, the terms %？(m/m) and %？(V/V) are used to represent respectively the mass fraction, w, and the volume fraction, φ. This document defines two procedures, A and B. Procedure A is applicable to automotive motor gasoline with total aromatics of 19,32？%？(V/V) up to 46,29？%？(V/V); total olefins from 0,40？%？(V/V) up to 26,85？%？(V/V); oxygenates from 0,61？%？(V/V) up to 9,85？%？(V/V); oxygen content from 1,50？%？(m/m) to 12,32？%？(m/m); benzene content from 0,38？%？(V/V) up to 1,98？%？(V/V) and toluene content from 5,85？%？(V/V) up to 31,65？% (V/V). The method has also been tested for individual oxygenates. A precision has been determined for a total volume of methanol from 1,05？%？(V/V) up to 16,96？%？(V/V); a total volume of ethanol from 0,50？%？(V/V) up to 17,86？%？(V/V); a total volume of MTBE from 0,99？%？(V/V) up to 15,70？%？(V/V), a total volume of ETBE from 0,99？%？(V/V) up to 15,49？%？(V/V), a total volume of TAME from 0,99？%？(V/V) up to 5,92？%？(V/V), and a total volume of TAEE from 0,98？%？(V/V) up to 15,59？%？(V/V). Although this test method can be used to determine higher-olefin contents of up to 50？%？(V/V), the precision for olefins was tested only in the range from 0,40？%？(V/V) to 26,85？%？(V/V). Although specifically developed for the analysis of automotive motor gasoline that contains oxygenates, this test method can also be applied to other hydrocarbon streams having similar boiling ranges, such as naphthas and reformates. NOTE？2？For Procedure？A, applicability of this document 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. Procedure B describes the analysis of oxygenated groups (ethanol, methanol, ethers, C3 – C5 alcohols) in ethanol (E85) automotive fuel containing ethanol between 50？%？(V/V) and？85？%？(V/V). The gasoline is diluted with an oxygenate-free component to lower the ethanol content to a value below 20？%？(V/V) before the analysis by GC. The sample can be fully analysed including hydrocarbons. Precision data for the diluted sample are only available for the oxygenated groups. NOTE？3？For Procedure B, the precision can be used for an ethanol fraction from about 50？% up to 85？%？(V/V). For the ether fraction, the precision as specified in Table？6 can be used for samples containing at least 11？%？(V/V) of ethers. For the higher alcohol fraction, too few data were obtained to derive a full precision statement and the data presented in Table？6 are therefore only indicative. NOTE？4？An overlap between C9 and C10 aromatics can occur. However, the total is accurate. Isopropyl benzene is resolved from the C8 aromatics and is included with the other C9 aromatics.