Marine by-products (blood, viscera, heads, bellies, bones, skin, etc.) represent a main concern for current fishery management po­licies and legislations. However, marine by-products constitute a relevant source of main constituents like lipids, proteins, minerals, and vitamins, in addition to minor components such as enzymes, amino acids, pigments, amino acids, chitin, or collagen. Concerning lipid compound extraction, a great attention has been accorded recently to replace organic solvents by eco-friendly solvents. In the present research, a comparative extraction of valuable lipid compounds by different green solvents was carried out on Patagonian squid (Doryteuthis gahi) by-products. By-products, considered as a single product, were subjected to the following solvent systems: ethanol, acetone, ethyl acetate, 1/1 ethanol/acetone, 1/1 ethanol/ethyl acetate, and 1/1 acetone/ethyl acetate. Analyses carried out included lipid yield, lipid class content and fatty acid (FA) composition. Results were compared to the lipid extract obtained by the traditional procedure (1 /1 chloroform/methanol). As a result, lipid yields obtained by green solvent systems led to a 33.4-73.2% recovery compared to traditional extraction; the highest values (p0.05) in the w3/w6 ratio. Green extracting systems led to higher average values for eicosapentaenoic acid content (15.66-18.56 g· 100 g-1 total FA) and polyene index (1.93-3.29) than chloroform/methanol extraction; differences were found significant (p0.05) were detected for docosahexaenoic acid content between traditional procedure and green systems, all values being included in the 31.12-32.61 g· 100 g-1 total FA range. Suitability of current green solvent systems as an alternative method for extraction of valuable lipid compounds is concluded

Poster.-- 50th Conference of the Western European Fish Technologists Association, Rotterdam, Netherlands, 17th - 21st October 2022

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