盐析法从干南瓜皮中提取果胶的技术研究

STUDY ON EXTRACTING PECTIN FROM PUMPKIN PEEL BY THE WAY OF SALTING OUT

采用盐析法从干南瓜皮中提取食用果胶,对其制取工艺和条件进行了研究,结果表明:料液比为1:7,萃取液的pH值为2,萃取温度为95℃,萃取时间为90min,并用硫酸铝作沉淀剂,果胶得率达13.6%。与酒精法相比,盐析法提取果胶具有成本底,得率高、果胶制品纯洁等特点。

A research is conducted on the technological conditions of extracting pectin from fresh pumpkin peel by salting-out. Experimental results show that when anticipating the liquid compares to 1∶7,the pH value of the extracting solvent reachingz,the operating temperature as high as 95 ℃ and using aluminum sulfate as settlement after 90 minutes,the total yield of pectin is (higher than) 13.6%. Compared with the way of alcohol,the way of salting-out has advantages of lower cost and higher yield.