大叶秦艽总环烯醚萜苷3种提取工艺优化及其抗氧化活性研究

目的 优化大叶秦艽总环烯醚萜苷回流提取、超声提取、超声-回流提取工艺,并评价其抗氧化活性。方法 在单因素试验基础上,以乙醇体积分数、液料比、回流时间、提取次数、超声时间、超声功率为影响因素,总环烯醚萜苷含量为评价指标,响应面法优化3种提取工艺,再测定提取物对DPPH、OH~-自由基的清除率。结果 最优回流提取工艺为乙醇体积分数75%,液料比20∶1,回流时间100 min,提取次数2次,总环烯醚萜苷含量为62.75 mg/g;最优超声提取工艺为乙醇体积分数78%,液料比20∶1,超声时间42 min,超声功率204 W,总环烯醚萜苷含量为70.25 mg/g;最优超声-回流提取工艺为乙醇体积分数76%,液料比17∶1,超声时间29 min,回流时间72 min,总环烯醚萜苷含量为76.49 mg/g。超声-回流提取工艺所得提取物对DPPH、OH~-自由基的清除率高于其他2种提取工艺所得。结论 超声-回流提取工艺更适合大叶秦艽总环烯醚萜苷的提取。

A Comparative Study of Process Parameter Optimization and Process of Flavonoid in Planted Trollius Chinensis through Backflow Method, Ultrasonic Wave Method and MicrowaveMethod

It takes flavonoid extraction rate as indicator and adopts the method of orthogonal experiment to study process of total flavonoid in Trollius chinensis through ultrasonic wave assisted extraction, microwave assisted extraction and backflow extraction, as well as optimization of process parameter. The result indicates that in terms of extraction efficiency, microwave extraction method is better than ultrasonic radiation extraction method, which is better than backflow extraction method. Optimal process parameter through backflow extraction is： backflow temperature 60℃, fluid material ratio 1：20, ethanol density 65%, backflow time 60min; optimal process parameter through ultrasonic wave assisted extraction is： ultrasonic radiation temperature 70℃, fluid material ratio 1：20, ethanol density 65%, ultrasonic wave radiation time 45rain; optimal process parameter of microwave assisted extraction is： microwave radiation temperature 60℃, fluid material ratio 1：20, ethanol density 75%, microwave radiation time 45min.