1.1 本试验方法包括测定石油烃中溴反应物质的含量，因此是测定这些物质中微量不饱和物的一种方法。适用于溴指数低于1000的材料。 1.2 本试验方法仅适用于基本上不含烯烃的碳氢化合物或混合物，这些碳氢化合物或混合物基本上不含比异丁烷轻的物质，且蒸馏终点低于288 °C（550 °F）。 注1: 该程序已在溴指数在100至1000范围内的材料上进行了协同测试。这些材料包括石油馏分，如直馏和加氢裂化石脑油、转化炉进料、煤油和航空涡轮燃料。 注2: 溴指数大于1000的材料应使用试验方法进行溴值试验 D1159 /IP 130。 注3: 应使用试验方法测定工业芳烃的溴指数 D1492 或 D5776 . 小组委员会目前正在研究如何实现更一致的终点值。 1.3 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.4 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。 1.5 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 本试验方法提供了对沸腾至288℃的石油馏出物中痕量不饱和烃的测量  °C（550 °F）。估计这些材料的数量有助于评估较轻馏分用作反应溶剂的适用性。

1.1 This test method covers the determination of the amount of bromine-reactive material in petroleum hydrocarbons and is thus a measure of trace amounts of unsaturates in these materials. It is applicable to materials having bromine indexes below 1000. 1.2 This test method is applicable only to essentially olefin-free hydrocarbons or mixtures that are substantially free from material lighter than isobutane and have a distillation end point under 288 °C (550 °F). Note 1: This procedure has been cooperatively tested on materials with bromine indexes in the range from 100 to 1000. These materials include petroleum distillates such as straight-run and hydrocracked naphtha, reformer feed, kerosine, and aviation turbine fuel. Note 2: Materials with bromine index greater than 1000 should be tested for bromine number using Test Method D1159 /IP 130. Note 3: Bromine index of industrial aromatic hydrocarbons should be determined using Test Method D1492 or D5776 . The subcommittee is currently examining ways to achieve more consistent end point values. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.4 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. 1.5 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 provides a measure of trace amounts of unsaturated hydrocarbons in petroleum distillates boiling up to 288  °C (550 °F). An estimate of the quantity of these materials is useful in assessing the suitability of the lighter fractions for use as reaction solvents.