1.1 本详细的碳氢化合物分析（DHA）试验方法包括测定石油石脑油中的烷烃、环烷烃和单芳烃（PNA），如 表1 . 洗脱后的成分 n -壬烷（bp 150.8 °C）确定为单个组。 1.2 本试验方法适用于无烯烃（<2 % 液态烃混合物，包括未净化石脑油、重整油和烷基化物。烯烃含量可通过试验方法测定 D1319号 或 D6839 . 碳氢化合物混合物必须具有98 % 250点 °C或更低，由试验方法确定 D3710 或 D7096 或同等产品。 1.3 0.05处存在的部件 % 可以通过质量水平或更高来确定。 1.4 对于碳数C7以上的PNA，本试验方法可能不完全准确；试验方法 D5443 或 D6839 可用于验证或补充碳数>C7的本试验方法的结果。 1.5 可通过DHA测试方法测定含烯烃样品中的详细碳氢化合物成分 D6729 , D6730 或 D6733 . 1.6 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。 1.7 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。 第节给出了具体的警告声明 8. . 1.8 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 对由石油石脑油、重整油或烷基化油组成的碳氢化合物成分的了解有助于原油估值、烷基化和重整过程控制、产品质量评估以及监管目的。 详细的碳氢化合物成分也用作炼油过程数学建模的输入。 5.2 通过本试验方法中描述的程序分离石脑油组分可能会产生一些代表共粘性化合物的峰。本试验方法不能将相对浓度归因于共凝剂。在缺乏支持信息的情况下，不建议将本试验方法的结果用于需要此类归因的目的。

1.1 This detailed hydrocarbon analysis (DHA) test method covers the determination of hydrocarbon components paraffins, naphthenes, and monoaromatics (PNA) of petroleum naphthas as enumerated in Table 1 . Components eluting after n -nonane (bp 150.8 °C) are determined as a single group. 1.2 This test method is applicable to olefin-free (<2 % olefins by liquid volume) liquid hydrocarbon mixtures including virgin naphthas, reformates, and alkylates. Olefin content can be determined by Test Method D1319 or D6839 . The hydrocarbon mixture must have a 98 % point of 250 °C or less as determined by Test Method D3710 or D7096 or equivalent. 1.3 Components that are present at the 0.05 % by mass level or greater can be determined. 1.4 This test method may not be completely accurate for PNA above carbon number C7; Test Method D5443 or D6839 may be used to verify or complement the results of this test method for carbon numbers >C7. 1.5 Detailed hydrocarbon components in olefin containing samples may be determined by DHA Test Methods D6729 , D6730 , or D6733 . 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. Specific warning statements are given in Section 8 . 1.8 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 A knowledge of the hydrocarbon components comprising a petroleum naphtha, reformate, or alkylate is useful in valuation of crude oils, in alkylation and reforming process control, in product quality assessment, and for regulatory purposes. Detailed hydrocarbon composition is also used as input in the mathematical modeling of refinery processes. 5.2 Separation of naphtha components by the procedure described in this test method can result in some peaks that represent coeluting compounds. This test method cannot attribute relative concentrations to the coelutants. In the absence of supporting information, use of the results of this test method for purposes which require such attribution is not recommended.