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采用超声、冷浸、热回流３种不同的提取方法，对延胡索中延胡索乙素含量测定进行比较，结果表明超声提取方法含量高，操作简便
Using ultrasonic, cold soak, hot reflux three different extraction methods, the determination of tetrahydropalmatine tetrahydropalmatine content comparison, the results show that the ultrasonic extraction method is high, easy to operate