超声波提取决明子蒽醌成分的研究

目的]确定超声提取决明子中的蒽醌类成分最佳工艺条件。方法]于40 kHz下采用超声提取决明子中的蒽醌类成分。在单因素试验的基础上,以乙醇浓度、料液比、提取时间3因素进行正交试验,优化超声波提取决明子中蒽醌的工艺条件,并与热回流法提取效果进行对比。结果]3种因素对超声波提取决明子中蒽醌提取率的影响程度依次为:乙醇浓度>料液比>提取时间。最佳提取条件为:乙醇浓度80%,料液比1∶30,提取时间20 min,提取2次。与传统热回流提取法的比较结果表明,超声波20 min的提取率相当于热回流1.5 h的提取率,大大降低能耗节约成本。结论]超声法提取法避免了长时间高温加热对蒽醌有效成分的破坏。

Study on Extracting Anthraquinone Component from Cassia obtusifolia L. by Sltrasound Wave

Objective] The aim of the study was to confirm the optimum technics condition of extracting anthraquinone component from Cassia obtusifolia L.by ultrasound wave.Method] The anthraquinone component from C.obtusifolia was extracted by ultrasound wave at 40 kHz.Based on single factor test the orthogonal experiment was conducted with 3 factors of ethanol concentration,solid-liquid ratio and extracting time to optimize the technics condition of extracting anthraquinone component from C.obtusifolia by ultrasound wave and compare its extracting effect with that by thermal refluxing extraction.Result] The effects of 3 factors on extracting anthraquinone component in order were ethanol concentration>solid-liquid ratio > extracting time.The optimum extracting condition was 80 % ethanol,solid-liquid ratio of 1∶30 and extracting time of 20 min.Conclusion]The ultrasound wave extraction can avoid the destruction of anthraquinone effective component caused by heading at high temperature for long time.