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建立了能反映决明子内在质量的结合大黄酚含量测定方法。对决明子中游离及结合大黄酚的提取条件进行了考察，建立了大黄酚反相高效液相色谱分离方法，并测定了从各地收集的样品。游离和结合大黄酚加样平均回收率分别为１０１．２％和１０３．３％，相对标准偏差为３．５％和１．８％。
A method for determining the combined chrysophanol content that reflects the intrinsic quality of Semen Cassiae was established. The extraction conditions of free and combined chrysophanol in Semen Cassiae were investigated. A method for the separation of chrysophanol by reversed-phase high performance liquid chromatography was established and samples collected from various regions were determined. The average recoveries of free and combined chrysophanol samples were 101.2% and 103.3%, respectively, with relative standard deviations of 3.5% and 1.8%.