1.1 本试验方法涵盖了用于定量测定最终沸点不超过220的汽油中有机含氧化合物的气相色谱程序 °C和沸点极限为130的氧化物 °C。当0.1%溶液中存在氧化物时适用 % 至20 % 按质量范围。 1.2 本试验方法旨在确定每种物质的质量浓度 含氧化合物 存在于汽油中。这需要了解所测定的每种氧化物的特性（用于校准目的）。然而，本试验方法中使用的氧气选择性检测器显示出与气体质量成比例的响应 氧气 . 因此，可以确定 氧气 由样品中的任何含氧化合物提供，无论是否已识别。汽油中的总氧含量可以通过准确测定的单个含氧化合物的总和来确定。存在的其他未标定或未知含氧化合物的总面积可转换为氧的质量浓度，并与已知含氧化合物的氧浓度相加。 1.3 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。 1.4 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。 1.5 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 在汽油调合中，有机含氧化合物的测定很重要。向汽油中添加醇、醚和其他含氧化合物，以增加辛烷值并减少一氧化碳的尾气排放。它们必须以适当的浓度和比例添加，以满足监管限制，并避免相分离和发动机性能或效率问题。 5.2 该试验方法提供了足够的氧对碳氢化合物的选择性和灵敏度，以允许在不受散装碳氢化合物基质干扰的情况下测定汽油样品中的氧化物。

1.1 This test method covers a gas chromatographic procedure for the quantitative determination of organic oxygenated compounds in gasoline having a final boiling point not greater than 220 °C and oxygenates having a boiling point limit of 130 °C. It is applicable when oxygenates are present in the 0.1 % to 20 % by mass range. 1.2 This test method is intended to determine the mass concentration of each oxygenate compound present in a gasoline. This requires knowledge of the identity of each oxygenate being determined (for calibration purposes). However, the oxygen-selective detector used in this test method exhibits a response that is proportional to the mass of oxygen . It is, therefore, possible to determine the mass concentration of oxygen contributed by any oxygenate compound in the sample, whether or not it is identified. Total oxygen content in a gasoline may be determined from the summation of the accurately determined individual oxygenated compounds. The summed area of other, uncalibrated or unknown oxygenated compounds present, may be converted to a mass concentration of oxygen and summed with the oxygen concentration of the known oxygenated compounds. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. 1.5 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 In gasoline blending, the determination of organic oxygenated compounds is important. Alcohols, ethers, and other oxygenates are added to gasoline to increase the octane number and to reduce tailpipe emissions of carbon monoxide. They must be added in the proper concentration and ratios to meet regulatory limitations and to avoid phase separation and problems with engine performance or efficiency. 5.2 This test method provides sufficient oxygen-to-hydro-carbon selectivity and sensitivity to allow determination of oxygenates in gasoline samples without interference from the bulk hydrocarbon matrix.