芦笋老茎中多糖提取工艺的优化

目的]优化微波直提法和微波-索氏提取法提取芦笋老茎中多糖的工艺。方法]以多糖提取率为考察指标,通过正交试验优化2种提取方法的提取工艺。结果]微波直提法的最佳工艺条件为：料液比为1∶30,提取时间为20 min,提取温度为60℃,微波功率为600 W,在此条件下多糖的提取率为4.35%;微波-索氏提取法的最佳工艺条件为：料液比为1∶33,微波时间为10 min,微波功率为600W,提取温度为70℃,在此条件下多糖的提取率为2.29%。结论]微波直提法具有提取效率高,提取温度低,能量消耗小等特点,可用于实际生产中。

Optimization of Extraction Process for Polysaccharide from Old Stem of Asparagus

Objective] To optimize the extraction conditions of microwave extraction and microwave-soxhlet extraction for polysaccharide from old stems of Asparagus.Method] By employing yield of polysaccharide as investigation index,the extraction processes of the two methods were optimized by orthogonal test.Result] The optimal extraction conditions of microwave extraction were determined to be solid to liquid ratio of 1∶ 30,extraction duration of 20 min,extraction temperature of 60 ℃ and extraction power of 600 W,under which,the yield of polysaccharide reached as high as 4.35%.The optimum extraction process of microwave-soxhlet extraction were as follows:solid to liquid ratio of 1∶ 30,extraction duration of 10 min,extraction power of 600 W and extraction temperature of 70℃,and the yield of polysaccharide reached 2.29% under the optimal extraction conditions.Conclusion] High in extraction efficiency,low in extraction temperature and save in consumption,the microwave extraction is favorable for the extraction of polysaccharide from old stem of Asparagus in practical production.