1.1 这些试验方法包括乙苯和总八碳（C）的测定 8. )和浓度范围为0.1至30的重芳烃 % 蒸馏范围为149至210的矿质酒精 °C（300至410 °F）由试验方法确定 D86 . 该程序允许识别和计算0.1体积的芳香族成分浓度 %. 1.2 分析化学家认识到，对未知样品进行单柱气相色谱分析是有风险的。在这种情况下，必须使用多种不同的分析技术进行绝对阳性识别，例如，几个不同的气相色谱柱、气相色谱/质谱仪或气相色谱/红外等。在这些测试方法中，材料是已知的，并且定义明确。 1.3 含氧化合物（如果存在）可能会干扰并导致错误结果。 这种含氧化合物通常不存在于矿物酒精中。 1.4 包括以下三种测试方法: 1.4.1 试验方法A， 乙苯含量的测量，C 8. 通过单填充柱气相色谱分析，加上较高的芳烃（乙苯除外）和总芳烃。 1.4.2 试验方法B， 通过快速填充柱气相色谱分析法测量乙苯含量。 1.4.3 试验方法C， 乙苯含量的测量，C 8. 通过毛细管柱气相色谱分析加上高级芳烃（乙苯除外）和总芳烃。 1.5 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.6 为了确定使用本试验方法的观察值或计算值是否符合相关规范，应将试验结果四舍五入到最后右侧的“最近单位”- 根据实践修约方法，用于表示规格极限的手写数字 E29年 . 1.7 有关危险信息和指南，请参阅供应商的材料安全数据表。 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====== 4.1 制定这些测试方法是为了测量矿物油中芳烃的类型和数量，以确定是否符合限制溶剂芳烃含量的空气污染法规。已证明它们是可行的，并能产生准确的结果。然而，由于测试对操作变量的敏感性，一些在碳氢化合物气相色谱分析方面经验有限的实验室在执行测试时可能会遇到困难。

1.1 These test methods cover the determination of ethylbenzene and total eight-carbon (C 8 ) and heavier aromatics in the concentration range from 0.1 to 30 % in mineral spirits having a distillation range from 149 to 210 °C (300 to 410 °F) as determined by Test Method D86 . The procedures permit the identification and calculation of concentrations of aromatic components to 0.1 volume %. 1.2 It is recognized by analytical chemists that a single column gas chromatography analysis of an unknown sample is risky. In such cases, multiple and different analytical techniques must be used for absolutely positive identification, for example, several different gas chromatography columns, gas chromatography/mass spectrometer, or gas chromatography/infrared, etc. In these test methods the material is known and is clearly defined. 1.3 Oxygenated compounds, if present, may interfere and cause erroneous results. Such oxygenated compounds are not normally present in mineral spirits. 1.4 Three test methods are covered as follows: 1.4.1 Test Method A, measurement of ethylbenzene content, C 8 plus higher aromatics (except ethylbenzene), and total aromatics by means of a single packed column gas chromatographic analysis. 1.4.2 Test Method B, measurement of ethylbenzene content by means of a rapid packed column gas chromatographic analysis. 1.4.3 Test Method C, measurement of ethylbenzene content, C 8 plus higher aromatics (except ethylbenzene) and total aromatics by means of a capillary column gas chromatographic analysis. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29 . 1.7 For hazard information and guidance, see the supplier’s Material Safety Data Sheet. 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 ====== 4.1 These test methods were developed to measure the types and amounts of aromatics in mineral spirits to determine compliance with air pollution regulations that restrict the aromatic content of solvents. They have been demonstrated to be workable and to produce accurate results. However, due to the sensitivity of the tests to operating variables, some laboratories having limited experience with gas chromatographic analyses of hydrocarbons may experience difficulty in performing the tests.