微波法萃取紫色甘薯皮原花青素工艺的研究

Study on the microwave extraction technology of proanthocyanidins from sweetpotato skins

采用微波提取技术提取紫色甘薯皮中原花青素,研究微波控制条件对原花青素提取率的影响,并在单因素的基础上进行正交实验。研究结果表明:微波提取可以有效缩短原花青素提取时间并提高提取率,微波提取紫色甘薯皮原花青素的最佳提取工艺条件为以60%乙醇为提取液,微波功率600W、料液比为1∶14、微波作用时间140s、提取1次,在此条件下,原花青素的提取率为2.86%。

Microwave technology was used to the extract proanthocyanidin from sweetpotato skins,and the influencing factors of proanthocyanidins extraction rate was studied through the single factors and orthogonal test.Results showed that microwave technology could reduce the extracted time and increase the extracted rate effeciontly on proanthocyanidin extraction.The optimal microwave conditions were available in proanthocyanidin extraction of sweetpotato skins as follows：60% ethanol as solvent,microwave power 600 W,ratio of solid-liquid 1：14,extraction time 140 s,1 time extraction.The extraction percent of proanthocyanidins from sweetpotato skins was 2.86% on the optimum conditions.