山核桃油的理化性质及脂肪酸组成分析_陆浩 . Physicochemical properties and fatty acid composition of pecan oil

Abstract

University of Technology,Zhengzhou 450052,China) The physicochemical properties and the fatty acid composition of pecan oil were mainly analyzed.The results were as follows:the oil content 68.81%,acid value 3.10 mgKOH/g,peroxide value 2.43 mmol/kg,saponification value 195.9 mgKOH/g,iodine value 105.9 gI/100 g.Five kinds of fatty acids were found in pecan oil,and the content of oleic acid and linoleic acid was 66.12% and 21.81%,respectively.The Sn-2 fatty acids were mainly composed of oleic acid and linoleic acid,in which the content of oleic acid and linoleic acid was 73.51% and 23.90%,respectively.The fatty acid distribution of pecan oil was also determined,and the highest content of OOO was 28.65%.The oxidative stability of pecan oil was determined by Rancimat method.In the condition of 25℃ and 20℃,the shelf life of pecan oil was 0.41 year and 0.61 year,respectively.