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ABSTRACT
Krill oils (KOs) were extracted from Antarctic krill using ethanol, hexane, or their mixture (1:2, v/v) with yields of 21.32%, 8.50%, and 18.75%, respectively. The total nitrogen content of the aforementioned oils was 2.76%, 1.06%, and 1.87%, respectively, indicating the presence of lipoprotein. All KOs contained a high proportion of phospholipid (PL) (30.20–64.82% of total lipids) and polyunsaturated fatty acids (PUFA) (30.00–34.94% of total FAs). Among PL, phosphatidylcholine was dominant (89.81–90.60 mol %). In contrast, KO extracted with the mixed solvent had the highest amount of glycerophosphocholine species containing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).
Additional information
Funding
This work was financially supported by “The National High Technology Research and Development Program of China (863 Program) (No. 2011AA090801)”, “Program for Liaoning Excellent Talents in University (LR2015006), “Liaoning Provincial Natural Science Foundation of China (2015020781)”, “Project of Distinguished Professor of Liaoning Province (2015-153)”, and “Organization Project for National Engineering Research Center of Seafood funded by Ministry of Science and Technology of the People’s Republic of China (No. 2012FU125X03)”.