Studies on Extraction Process of Total Polyphenols from Galanga (<i>Alpinia officinarum</i> Hance) Rhizomes
Keywords:
Galanga rhizomes, Polyphenols, Extraction processAbstract
The effects of different factors on the yield of total polyphenols were discussed, and the extraction conditions of total polyphenols from galanga rhizomes based on single-factor test and orthogonal experiment were studied in this paper. The results showed that, ethanol concentration had the great effects on the yield of total polyphenols, fllowed by extraction temperature and extraction time, and that ethanol concentration and extraction temperature have significant difference (p<0.05). The optimum extraction conditions were ethanol concentration 60%, extraction temperature 30 oC, extraction time 1.0 h and ratio of liquid to material 15:1. Under the optimized conditions, the yield of total polyphenols from galanga rhizomes was 13.43 mg/g.
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