1.1本试验方法涵盖商业丁烯、丁烯浓缩物和丁烷-丁烯混合物的气相色谱分析。 1.2本试验方法不包括高纯度丁烯-1或高纯度异丁烯流，或两者。然而，附录X3中列出的一个或多个色谱柱可能能够进行高纯度分析所需的分离。 1.3本试验方法旨在以约0.05%或更高的速度覆盖以下列出的部件。它不用于微量碳氢化合物分析。待测定组分为:丙烷、丙烯、异丁烷、， n -丁烷、丁烯-1、异丁烯、， trans公司 -丁烯-2， cis公司 -丁烯-2，1,3-丁二烯，异戊烷， n -戊烷。 1.4以国际单位制表示的数值应视为标准。以英寸-磅为单位的数值仅供参考。 1.5 本标准并非旨在解决与其使用相关的所有安全问题。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 有关具体的警告声明，请参见5.3.1 . ====意义和用途====== 该测试方法可用于确定用于托管转移支付的丁烯流组成。它还能够提供必要的数据，以评估运行工厂的加工要求。

1.1 This test method covers the gas chromatographic analysis of commercial butylenes, butylene concentrates, and butane-butylene mixtures. 1.2 This test method does not cover high-purity butene-1 or high-purity isobutene streams, or both. However, it is possible that one or more columns listed in Appendix X3 may be capable of the separation necessary for high-purity analyses. 1.3 This test method is designed to cover the components listed below at about 0.05 % or greater. It is not intended for trace hydrocarbon analysis. Components to be determined are: propane, propylene, isobutane, n -butane, butene-1, isobutene, trans -butene-2, cis -butene-2, 1,3-butadiene, isopentane, n -pentane. 1.4 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units are for information only. 1.5 This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 5.3.1 . ====== Significance And Use ====== This test method could be used to determine butylene stream composition for custody transfer payments. It is also capable of providing data necessary to evaluate processing requirements in an operating plant.