[Condition optimization experiment of microwave extaction of flavonoids in rhizome of Drynaria fortunei].

The experiment extracted flavonoids in rhizome of Drynaria fortunei by microwave extraction, and determined the extraction rate through colorimetry. Through the single factor experiment and orthogonal method, the optimum extraction conditions were as follows: ethanol concentration was 40%, solid-liquid ratio was 1:20 (g/mL), microwave power was 325 W, extraction time was 40 s. Under these conditions, the extraction rate reached 1.73%. In all condtions, microwave power has the most significant effect on extraction rate. Microwave extraction has obvious advantages in comparison with traditional sovent refluxing method.