2009•Food ScienceRequires access
Microwave-assisted Extraction of Proanthocyanidins from Peanut Skin
Qingli Yang
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Abstract
Single factor method and response surface methodology(RSM) based on a three-level, three-variable central composite rotatable design(CCRD) were employed for the optimization of microwave-assisted extraction of proanthocyanidins from peanut skin.Results showed that ratio of material to solvent and extraction temperature both exhibited significant nonlinear effects on extraction yield of proanthocyanidins;the optimum conditions for the extraction were as follows:microwave output power 600 W, ethanol concentration 40%, ratio of material to solvent 1:24.5, extraction time 91s, and extraction temperature 40 ℃;under the optimum extraction conditions, the extraction yield of proanthocyanidins was 12.59%.It was concluded from verification experiments that RSM is applicable to the optimization of microwave-assisted extraction of proanthocyanidins from peanut skin and the optimal extraction procedure obtained has some practical value.