A Study on Extracting Technology of Proanthocyanidins from Strawberry

Using proanthocyanidins content from strawberry as the index of investigation,the effects of ethanol concentration,extraction temperature,ratio of solid-liquid and extraction time on the extraction of proanthocyanidins are studied.The results show that the best extraction conditions are 70% of ethanol,ratio of solid-liquid being 1:20,temperature 50 ℃,and extraction time 70 minutes.Under these conditions the extraction rate is 24.23%.