Methods The emodin and chrysophanol were extracted by methanol or ethanol by means of ultrasonic or refluxing respectively.The emodin and chrysophanol contents were determined by RP-HPLC methods.

• 方法甲醇超声波、乙醇超声波、甲醇回流和乙醇回流分别提取决明子中的大黄素与大黄酚,高效液相色谱方法测定大黄素与大黄酚含量。