1.1本试验方法包括甲烷、乙烷、丙烷、丙烯、乙炔、， iso -高纯度乙烯中的丁烷、丙二烯、丁烷、反式-2-丁烯、丁烯-1、异丁烯、顺式-2-丁烯、甲基乙炔和1,3-丁二烯。乙烯纯度可以通过从100.00%中减去所有杂质的总百分比来计算。由于本试验方法不能测定所有可能的杂质，如CO，CO 2. H 2. O、 醇类、氮氧化物、羰基硫以及高于癸烷的碳氢化合物，可能需要进行额外的测试，以充分表征乙烯样品。 1.2本试验方法中的数据报告为ppmV（百万分体积）。在浓度范围为4至340ppmv（2至204 mg/kg）的实验室间合作研究中评估了该试验方法。实验室间合作研究的参与者以非国际单位制报告数据。尽可能包括国际单位制。 1.3 本标准无意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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1某些制造过程需要高纯度乙烯作为原料，微量某些碳氢化合物杂质的存在可能会产生有害影响。本测试方法适用于设定规格、用作内部质量控制工具以及用于开发或研究工作。 4.2本试验方法不检测H等杂质 2. O、 CO，CO 2. ，以及样品中可能存在的醇。碳氢化合物高于 n -如果样品中存在癸烷，则不能用本试验方法进行分析。 试验方法 D2504 介绍了不凝结气体的分析和试验方法 D2505 解决了CO的分析 2. . 指导 D5234 描述了乙烯中存在的所有潜在杂质。在确定乙烯中杂质的总浓度时，应参考这些标准。

1.1 This test method covers the determination of methane, ethane, propane, propene, acetylene, iso -butane, propadiene, butane, trans-2-butene, butene-1, isobutene, cis-2-butene, methyl acetylene and 1,3-butadiene in high-purity ethylene. The purity of the ethylene can be calculated by subtracting the total percentage of all impurities from 100.00 %. Since this test method does not determine all possible impurities such as CO, CO 2 , H 2 O, alcohols, nitrogen oxides, and carbonyl sulfide, as well as hydrocarbons higher than decane, additional tests may be necessary to fully characterize the ethylene sample. 1.2 Data are reported in this test method as ppmV (parts per million by volume). This test method was evaluated in an interlaboratory cooperative study in the concentration range of 4 to 340 ppmV (2 to 204 mg/kg). The participants in the interlaboratory cooperative study reported the data in non-SI units. Wherever possible, SI units are included. 1.3 This standard dose 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 4.1 High-purity ethylene is required as a feedstock for some manufacturing processes and the presence of trace amounts of certain hydrocarbon impurities can have deleterious effects. This test method is suitable for setting specifications, for use as an internal quality control tool, and for use in development or research work. 4.2 This test method does not detect such impurities as H 2 O, CO, CO 2 , and alcohols that may be present in the sample. Hydrocarbons higher than n -decane cannot be analyzed by this test method, if present in the sample. Test Method D2504 addresses the analysis of noncondensable gases and Test Method D2505 addresses the analysis of CO 2 . Guide D5234 describes all potential impurities present in ethylene. These standards should be consulted when determining the total concentration of impurities in ethylene.