该方法用于使用滴定法测定马来酸酐与各种油的反应性，从脱丁烷轻烃馏分到重质干油。该方法可测量样品中的共轭二烯烃含量。由于某些共轭二烯可能不会完全反应，而共轭二烯以外的某些化合物也可能发生反应，因此该测定在一定程度上是经验性的。例如，蒽及其许多同系物和相应的烷基化化合物，以及某些乙烯基芳烃，以二烯烃的形式与马来酸酐反应。因此，必须根据这些规定的限制仔细解释通过该方法获得的结果。二烯值的定量范围为1.2至100以上。可使用改进的程序估算小于1的二烯值。 2.如果已知或可以估计共轭二烯烃的平均分子量，则可以计算共轭二烯烃的质量分数浓度。

This method is for determining maleic anhydride reactivity with a wide variety of oils, ranging from debutanized light hydrocarbon distillates to heavy drying oils, using titration.The method gives a measure of the conjugated diolefin content of the sample. The determination is somewhat empirical since some conjugated diolefins may not react completely, while certain compounds other than conjugated diolefins also may be reactive. For example, anthracene, along with many of its homologs and corresponding alkylated compounds, as well as certain vinyl aromatics, react as dienes with maleic anhydride. Therefore, the results obtained by this method must be carefully interpreted in the light of these specified limitations.The range of quantitation for diene value is from 1.2 to over 100. A modified procedure can be used to estimate diene values less than 1.2.If the average molecular weight of the conjugated diolefins is known or can be estimated, the mass-% concentration of conjugated diolefins can be calculated.