%0 Journal Article %A XU Hua %A ZHANG Ru %A ZHANG Jinjie %A LOU Qiaoming %A YANG Wenge %A XU Dalun %T Comparative Analysis of Fatty Acid Compositions of Laminaria japonica From Different Origins %D 2019 %R 10.11869/j.issn.100-8551.2019.04.0759 %J Journal of Nuclear Agricultural Sciences %P 759-765 %V 33 %N 4 %X In order to analyze comparatively the fatty acid compositions of Laminaria japonica from difference origins, the total lipid extraction conditions of Laminaria japonica from three origins (Fuzhou, Ningbo and Qingdao) were optimized by solvent methods, and the fatty acid compositions were analyzed by GC-MS in this study. The results indicated that extraction with dichloromethane-methanol was an ideal method for lipid extraction from Laminaria japonica with high extraction efficiency. The total lipid contents of Laminaria japonica from Fuzhou, Ningbo and Qingdao were 0.75%, 0.69% and 0.86%, respectively, with no significant difference. Additionally, thirty kinds of fatty acids were identified from total lipids of Laminaria japonica, which were mainly composed of C16:0, C18:1n-9, C20:4n-6 (AA) and C20:5n-3 (EPA). Meanwhile, significant differences were existed in fatty acid compositions from different origins. The contents of C20:4n-6 and C20:5n-3 in Fuzhou samples were 10.12% and 6.18%, respectively, and the content of C20:4n-6 was significantly higher than those in Ningbo (9.41%) and Qingdao (8.77%), while the content of C20:5n-3 was significantly lower than those in Ningbo (8.13%) and Qingdao (9.40%). Hence, the indexes (n-3 PUFA, n-6 PUFA, n-3/n-6, EPA+AA and EPA/AA) of Laminaria japonica from three origins were significantly different. This research provided theoretical basis for total lipid extraction, fatty acid analysis and nutritional evaluation of Luminaria japonica rom different origins. %U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2019.04.0759