【摘要】 实验使用超声喷泉替代气溶胶进行传质,改进了超声雾化提取-固相萃取法,设计了实验装置,并用于西洋参叶中的8种常见人参皂苷的提取。对提取剂种类、体积、pH值和盐浓度,洗脱剂种类和体积以及吸附剂质量等影响因素进行了考察与优化。在最优条件下,8种人参皂苷的回收率在96.3%~110.6%之间,RSD在2.8%~4.3%之间,本方法对8种人参皂苷均具有良好的提取率。与传统的超声雾化提取-固相萃取法相比,本方法简化了提取装置,缩短了提取时间,提高了提取效率。更多还原

【Abstract】 A new ultrasonic-assisted extraction （UANE） method coupled with solid phase extraction （SPE） using ultrasonic fountain was established for the extraction of eight common ginsenosides from leaves of Panax quinquefolium L. The extraction system has been designed and several experimental parameters,including the type and volume of extraction solvent,p H value and salt concentration of extraction solvent,type and volume of elution solvent,and amount of C₁₈,extraction time were examined and optimized. Under the optimal conditions,the recoveries of ginsenosides were in the range of 96.3%-110.6%,the relative standard deviations （RSDs） were in the range of 2.8%-4.3%,indicating that the method has a good performance for the extraction of these ginsenosides. Compared with traditional UANE-SPE method,the modified method simplified the extraction device,shortened the extraction time and improved the extraction efficiency.更多还原