1.1 此测试方法 3. 涵盖了以下材料溴值的测定: 1.1.1 基本上不含比异丁烷轻的物质并且具有90 % 蒸馏点（通过试验方法 D86 )327以下 °C（626 °F）。本试验方法通常适用于汽油（包括含铅、无铅和含氧燃料）、煤油和汽油范围内的蒸馏物，这些汽油、煤油和蒸馏物均在以下限值范围内: 90 % 蒸馏点，°C（°F） 溴值，最大值 3. 205岁以下（400） 175 205至327（400至626） 10 1.1.2 商业烯烃，基本上是脂肪族单体的混合物- 烯烃，并且溴值在95至165的范围内（参见 注1 )。已发现该测试方法适用于商业丙烯三聚体和四聚体、丁烯二聚体以及混合壬烯、辛烯和庚烯等材料。该试验方法对正常的α-烯烃不令人满意。 注1: 由于该试验方法的精度仅在溴值以内或在溴值范围内确定，因此施加了这些限值。 1.2 溴值的大小是溴反应性成分的量的指示，而不是成分的识别；因此，如果没有在 附件A1 。 1.3 对于溴值小于1.0的石油烃混合物，可以通过使用试验方法获得溴反应成分的更精确测量 D2710 如果溴值小于0.5，则试验方法 D2710 或工业芳烃的类似溴指数方法，试验方法 D1492 或 D5776 必须根据其各自的范围使用。使用因数1000将溴值转换为溴指数的做法不适用于这些较低的溴值。 1.4 以国际单位制表示的数值应视为标准。 1.4.1 例外-- 括号中给出的值仅供参考。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 有关具体的警告声明，请参阅章节 7. ， 8. 和 9 。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 溴值可用于测量石油样品中的脂族不饱和度。当与中所述的计算程序结合使用时 附件A2 ，它可以用来估计沸点高达约315的石油馏分中烯烃的百分比 °C（600 °F）。 5.2 商业脂肪族单烯烃的溴值为其纯度和同一性提供了支持性证据。

1.1 This test method 3 covers the determination of the bromine number of the following materials: 1.1.1 Petroleum distillates that are substantially free of material lighter than isobutane and that have 90 % distillation points (by Test Method D86 ) under 327 °C (626 °F). This test method is generally applicable to gasoline (including leaded, unleaded, and oxygenated fuels), kerosine, and distillates in the gas oil range that fall in the following limits: 90 % Distillation Point, °C (°F) Bromine Number, max 3 Under 205 (400) 175 205 to 327 (400 to 626) 10 1.1.2 Commercial olefins that are essentially mixtures of aliphatic mono-olefins and that fall within the range of 95 to 165 bromine number (see Note 1 ). This test method has been found suitable for such materials as commercial propylene trimer and tetramer, butene dimer, and mixed nonenes, octenes, and heptenes. This test method is not satisfactory for normal alpha-olefins. Note 1: These limits are imposed since the precision of this test method has been determined only up to or within the range of these bromine numbers. 1.2 The magnitude of the bromine number is an indication of the quantity of bromine-reactive constituents, not an identification of constituents; therefore, its application as a measure of olefinic unsaturation should not be undertaken without the study given in Annex A1 . 1.3 For petroleum hydrocarbon mixtures of bromine number less than 1.0, a more precise measure for bromine-reactive constituents can be obtained by using Test Method D2710 . If the bromine number is less than 0.5, then Test Method D2710 or the comparable bromine index methods for industrial aromatic hydrocarbons, Test Methods D1492 or D5776 must be used in accordance with their respective scopes. The practice of using a factor of 1000 to convert bromine number to bromine index is not applicable for these lower values of bromine number. 1.4 The values stated in SI units are to be regarded as the standard. 1.4.1 Exception— The values given in parentheses are for information only. 1.5 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. For specific warning statements, see Sections 7 , 8 , and 9 . 1.6 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 The bromine number is useful as a measure of aliphatic unsaturation in petroleum samples. When used in conjunction with the calculation procedure described in Annex A2 , it can be used to estimate the percentage of olefins in petroleum distillates boiling up to approximately 315 °C (600 °F). 5.2 The bromine number of commercial aliphatic monoolefins provides supporting evidence of their purity and identity.