目的采用罐组逆流提取技术提取荷叶中的荷叶生物碱并优化其工艺条件。方法采用分光光度法测定荷叶生物碱。按L16(44)正交设计表设计试验,分别考察提取时间、提取温度、固液比和乙醇体积分数4个因素的影响。结果通过极差分析得出罐组逆流提取荷叶生物碱的最佳工艺条件为:提取时间25 min,提取温度80℃,固液比1∶50,乙醇体积分数为70%。结论可以将罐组逆流提取技术应用于荷叶提取工程。

Objective To optimize the extracting process of alkaloid from Nelumbo nucifera leaves by multi-stage countercurrent extraction.Methods The spectrophotometry was used to determine the alkaloids.The extracting process of alkaloid was optimized by L16(44) to observe the effect of extraction time,extraction temperature,solid to liquid ratio,and ethanol concentration,respectively.Results The optimum extraction parameters were extraction time 25 min,extraction temperation 90 ℃,solid to liquid ratio 1∶50,and ethanol concentration 70%.Conclusion The multi-stage countercurrent extraction is used to the extracting process of alkaloid from N.nucifera leaves.