US EPA

8529700 

Journal Article 

提取方法对紫云英籽油脂肪酸组成及氧化稳定性的影响 

Jiang, X; Jiang, Y; Zhang, Y 

2020 

Editorial Department, Chinese Cereals and Oils Association 

35 

7 

79-83 

Chinese 

Microwave-ultrasound synergistic extraction (MUAE), ultrasound-assisted extraction (UAE) and solvent extraction (SE) were used to extract astragalus sinicus seed oil. The oil yield, physicochemical properties, fatty acid composition and oxidation stability of astragalus sinicus seed oil were determined and compared. The results indicated that the highest oil yield was 32.01% by solvent extraction. The color, density, refractive index and benzo (a) pyrene of seed oil extracted by the three methods had no significant difference, but the acid value, peroxide value and iodine value were different. The acid value and peroxide value of solvent extraction method were the highest, and the iodine value of ultrasound-assisted method was the highest. There was no significant difference in the total content of saturated fatty acid and unsaturated fatty acid among the three methods, but the content of fatty acid components was affected. The content of oleic acid and linoleic acid in solvent extraction method was the highest, and the content of linolenic acid in ultrasound-assisted method was the highest. The oxidation of seed oil extracted by three methods followed the first-order chemical reaction. The oxidation stability of seed oil extracted by solvent method was the best, and that of ultrasonic-assisted method was the worst. The oil and fatty acid composition of astragalus sinicus seed oil were comprehensively evaluated. It was better to extract by ultrasound-assisted method and store the oil at low temperature. © 2020, Dept. of JCCOA. All right reserved. 

Astragalus sinicus seed oil; Extraction method; Fatty acid composition; Oxidative stability; Physicochemical properties