1.1 本试验方法包括使用VPCR通过气相色谱法测定活原油和凝析油中的轻烃和临界点间隔 4. （参见 注1 )最多500 37.8°C时为kPa。 注1: 如测试方法所述 第6377页 . 1.2 甲烷（C 1. )至己烷（nC 6. )并对苯进行鉴定和定量。质量分数高达0.5的样品 % 甲烷，2.0 % 乙烷，10 % 丙烷或15 % 可以分析异丁烷。下限为0.001的质量分数 % 存在于这些化合物中。 1.3 该试验方法可用于测定碳分数区间的临界点（见 3.2.1 )从初始沸点（IBP）到391°C（nC 24 ). nC公司 24 报告正分数。 1.4 根据 12.1 也可以进行分析。 1.5 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.5.1 例外情况- 如果没有直接的SI等效值，如管道尺寸。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 本试验方法测定甲烷（nC 1. )至己烷（nC 6. )，切点碳分数区间为nC 24 和恢复（nC 24 +)从而避免高挥发性组分的损失并保持样品的完整性。该测试方法提供了高分辨率的轻端轮廓，有助于确定和改进适当的安全措施和产品保管运输程序。有关原油营销、调度和加工的决策可能取决于轻馏分组成结果。 5.2 状态方程计算可应用于该方法提供的变量，以允许额外的样本表征。

1.1 This test method covers the determination of light hydrocarbons and cut point intervals by gas chromatography in live crude oils and condensates with VPCR 4 (see Note 1 ) up to 500 kPa at 37.8 °C. Note 1: As described in Test Method D6377 . 1.2 Methane (C 1 ) to hexane (nC 6 ) and benzene are speciated and quantitated. Samples containing mass fractions of up to 0.5 % methane, 2.0 % ethane, 10 % propane, or 15 % isobutane may be analyzed. A mass fraction with a lower limit of 0.001 % exists for these compounds. 1.3 This test method may be used for the determination of cut point carbon fraction intervals (see 3.2.1 ) of live crude oils and condensates from initial boiling point (IBP) to 391 °C (nC 24 ). The nC 24 plus fraction is reported. 1.4 Dead oils or condensates sampled in accordance with 12.1 may also be analyzed. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5.1 Exception— Where there is no direct SI equivalent such as tubing size. 1.6 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. 1.7 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 This test method determines methane (nC 1 ) to hexane (nC 6 ), cut point carbon fraction intervals to nC 24 and recovery (nC 24 +) of live crude oils and condensates without depressurizing, thereby avoiding the loss of highly volatile components and maintaining sample integrity. This test method provides a highly resolved light end profile which can aid in determining and improving appropriate safety measures and product custody transport procedures. Decisions in regards to marketing, scheduling, and processing of crude oils may rely on light end compositional results. 5.2 Equation of state calculations can be applied to variables provided by this method to allow for additional sample characterization.