Title: Study on the Extraction Process of Flavonoids from Giant Dandelions
Abstract: [Objective] The purpose was to confirm the optimum parameters for the extraction process of flavonoids from dandelions.[Method] With the giant dandelions in Qinghai Province as tested material,its flavonoids content was extracted by ethanol extracting method,the effects of different ethanol concn.,the ratio of solid to liquid,the extracting temperature and times on the extraction rate of flavonoids from dandelions were studied through single factor test and the parameters for the extraction process of flavonoids were optimized through the orthogonal test.[Result] The single factor test showed that the extraction rate of flavonoids from dandelions was highest when the ethanol concn.was 60%,the ratio of solid to liquid was 1:25,the extracting temperature was 80 ℃ and the extracting times was 2 times.The orthogonal test showed that the factors of affecting the ethanol extraction of flavonoids from dandelions in order were extracting temperature ethanol concn. ratio of solid to liquid =extraction time and the optimized process conditions were as follows:extracting temperature of 80 ℃,extracting time of 3 h,ethanol concn.of 55% and the ratio of solid to liquid of 1:30.[Conclusion] The optimized verification test on the optimum process conditions for the extraction showed that the yield of total flavonoids from dandelions was about 4.89%,with relative standard deviation of 3.9%,proving that the optimized process was feasible.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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