Abstract:

The optimum conditions for microwave-assisted extraction of flavonoids from plumula nelumbinis were studied. The effects of microwave power, extraction time, and material-liquid ratio on extraction yield of flavonoids from plumula nelumbinis were investigated. The processing parameters was optimized by orthogonal array design. Results indicated processing parameters of microwave-assisted extraction affected flavonoids yield in the following order of microwave extraction time＞microwave power＞material-liquid ratio. The optimal extraction conditions found were: microwave power 700 W, microwave extraction time 10 min, and material-liquid ratio 2:100(g:mL).Under these conditions, the extraction yield of flavonoids from plumula nelumbinis was 1.8725%.Compared to traditional water extraction method, this method has the advantages of improving yield and reducing extraction time.