山核桃油提取工艺优化及脂肪酸组成分析 GC-MS . Optimization of Extraction Process of Carya Cathayensis Oil and Analysis of Fatty Acid Composition

Abstract

Extraction of Carya cathayensis oil from Carya hunanensis assisted by ultrasound and n- hexane is studied. Effects of extraction time,extraction temperature,ratio of solid to liquid and ultrasonic power on the extraction rate are explored. The result show that the optimum extraction condition is obtained as follows:extraction time 40 min,extraction temperature 35 ℃,ratio of solid to liquid 1:7.8,ultrasonic power 370 W. Under the optimal conditions,the extraction rate of Carya cathayensis oil is up to 67.63%. GC- MS is employed to analyze the components of fatty acid of the oil. The main components of Carya cathayensis oil are linoleic acid 67.62%,oleic acid 23.75%,linolenic acid 1.53%.