超声提取虎杖白藜芦醇及其液质联用分析

超声波对中药有效成分提取有明显作用，超声波的频率，强度、作用时间对中药有效成分提取的影响的研究已有很多，但超声波另一重要参数－占空比对中药有效成分提取的影响的研究还未见报道，用超声小辅助提取中药虎杖中白藜芦醇，探讨超声波的占空比改变对白藜芦醇有效成分含量的影响，用HPLC－MS分析提取物并比值其化学成分，发现不同占空比的超声波辅助提取白藜芦醇，对其含量有一定影响,占空比较小的超声波辅助提取，有利于保持较高的白藜芦醇的相对含量。

Extracting Resveratrol from the Polygonum Cuspidatum Sieb under Ultrasonic Wave and Its Analysis by High Performance Liquid Chromatography

It is efficient to extract active components from traditional Chinese medicine (TCM) by using ultrasonic wave. There has been many studies of the strength, frequency and action time of ultrasonic wave influencing extract active components from TCM. There is no report about the research of another parameter-ultrasonic action on-off ratio which influences the process of extrating effective composition from TCM. Using ultrasonic wave to extract resveratrol from the Polygonum cuspidatun sieb, the influence of ultrasonic on-off action ratio on the purity of resveratrol extracts from the Polygonum cuspidatum sieb is compared by analyzing the resveratrol with high performance liquid chromatography. The extracts from herbs under different ultrasonic action conditions have different impurities. The impurity of the extracts is increasing along with decreasing of on_off ratio of ultrasonic.