盐析法从猕猴桃皮渣中提取果胶的研究

Study on extracting pectin from kiwifruit peel by the way of salting out

采用盐析法从鲜猕猴桃皮渣中提取食用果胶，并对其制取工艺条件进行了研究，结果表明：当萃取液的ｐＨ值为２，温度９０℃，萃取时间为７０ｍｉｎ，并用硫酸铝作沉淀剂时，果胶得率达４％。与酒精法相比，盐析法提取果胶具有成本低、得率高等特点。

A research is conducted on the technological conditions of extracting pectin from fresh kiwifruit peel by salting-out.Experimental results show that when the pH value of the extracting solvent reaching 2,the operating temperaure as high as 90℃ and using aluminium sulfate as settlement after 70 minutes,the total yield of pectin is(higher than)4%.Compared with the way of alcohol,the way of salting out has advantages of lower cost and higher yield.