超声波提取夏枯草总黄酮效果研究

Study on Extraction Kinetics of Total Flavonoids in Prunella

目的研究超声强化提取及热浸提取夏枯草过程中总黄酮的动态变化,考察超声波对夏枯草总黄酮提取效果的影响。方法分别采用超声强化提取及热浸法提取夏枯草总黄酮,考察提取过程中总黄酮的动态变化情况。结果超声强化提取夏枯草总黄酮,提取率是热浸提取的2.73倍。在260 min时,超声强化提取及热浸法对夏枯草的提取率分别为99.21%,36.61%,提取出各自70%总黄酮的时间分别为58和106 min。结论超声波强化提取可显著提高夏枯草中总黄酮提取效果及提取率。

Objective To study dynamic changes of total flavonoids extracted from Prunella by using ultrasonic enhancement and hot-dip methods and the influence of ultrasonic on the total flavonoids extraction.Methods The total flavonoids in Prunella were extracted by ultrasonic enhancement and hot-dip methods.We investigated the dynamic changes of total flavonoids in the extraction process.Results The total flavonoids extraction rate of the ultrasound enhanced extraction was 2.73 times that of the hot-dip extraction.The extraction rates of ultrasonic enhancement and hot-dip extraction were 99.21% and 36.61% respectively at the 260th min.The extraction time was respectively 58 min and 106 min when 70% of total flavonoids were extracted.Conclusion Ultrasonic can significantly improve the extraction of total flavonoids from Prunella.