秦晶晶 钱慧琴 赵媛
摘要 [目的]筛选菟丝子总黄酮的提取方法,为充分利用开发菟丝子总黄酮资源提供科学依据。[方法]采用回流提取法、冷浸法、超声提取法、微波辅助萃取法、索氏提取法5种方法提取菟丝子中总黄酮含量,以芦丁为对照品,通过紫外分光光度法对总黄酮的含量进行精密测定,对提取效率进行综合比较。[结果]5种提取方法所得总黄酮含量从大到小依次为回流提取法(31.24 mg/g)、微波辅助萃取法(16.84 mg/g)、索氏提取法(12.82 mg/g)、超声提取法(9.74 mg/g)、冷浸法(8.88 mg/g),回流提取法所得总黄酮含量最高。[结论]回流提取法应用于菟丝子总黄酮的提取,具有提取速度快、提取效率高的优点。
关键词 菟丝子;总黄酮;回流提取法;超声提取法;冷浸法;微波辅助萃取法;索氏提取法
中图分类号 S567.21 文献标识码 A 文章编号 0517-6611(2017)34-0114-03
Abstract [Objective] The research aimed to screen the extraction methods of total flavonoids in Cuscuta chinesis,and provide scientific basis for the development of total flavones resources in Cuscuta chinesis.[Method]Five kinds of extraction methods:reflux extraction method,cold maceration method,ultrasonic extraction method,microwave assisted extraction method and Soxhlet extraction method were used to extrant the content of total flavonoids in Cuscuta chinesis,rutin as a reference substance,the content of total flavonoids was determined by UV spectrophotometry,and the extraction efficiency was compared comprehensively.[Result]The content of total flavoniods gained by five kinds of extraction method was followed by:refluxing extraction method (31.24 mg/g)>microwave assisted extraction method (16.84 mg/g)> Soxhlet extraction method (12.82 mg/g)>ultrasonic extraction method (9.74 mg/g)>cold maceration method (8.88 mg/g),the content of total flavonoids was the highest by refluxing extraction method.
[Conclusion]The refluxing extraction method is applied to the extraction of Cuscuta chinesis total flavonoids,which has the advantage of extraction speed and high extraction effciency.
Key words Cuscuta chinesis;Total flavonoids;Refluxing extraction method;Ultrasonic extraction method;Cold maceration method;Microwave assisted extraction method;Soxhlet extraction method
菟丝子为旋花科植物南方菟丝子(Cuscuta australis R.Br.)或菟丝子(Cuscuta chinesis Lam.)的干燥成熟种子,味辛、甘,平,归肾、肝、脾经,具有补益肝肾、固精缩尿、安胎明目、止泻的功效[1]。经现代研究表明,菟丝子含黄酮类、多糖、木脂素等化学成分,其中主要為黄酮类成分[2-3]。有研究表明,菟丝子提取物在抗炎、抗肿瘤、抗衰老、调节免疫、壮阳等方面具有重要的药理活性[4-7]。近年来对菟丝子总黄酮提取工艺的研究有一些报道,一般采用回流提取法、超声提取法、冷浸法、微波辅助萃取法、索氏提取法、闪式提取等方法提取菟丝子中总黄酮[8-11]。笔者在前人研究的基础上,分别采用回流提取法、超声提取法、冷浸法、微波辅助提取法、索氏提取法5种方法来提取菟丝子中总黄酮,以芦丁为对照品,采用紫外分光光度法(UV)测定菟丝子的总黄酮含量,以菟丝子总黄酮含量为指标,确定其最佳提取方法,为菟丝子中黄酮类化合物的提取提供理论依据。……p>