Fucoxanthin and Polyunsaturated Fatty Acids Co-Extraction by a Green Process

Antoine Delbrut (1, 2) , Pierre Albina (1) , Théo Lapierre (1) , Rémi Pradelles (2) , Eric Dubreucq (1)

1 UMR IATE - Ingénierie des Agro-polymères et Technologies Émergentes
2 Microphyt

By their autotrophic nature and their molecular richness, microalgae are serious assets in the context of current environmental and societal challenges. Some species produce both omega-3 long chain polyunsaturated fatty acids (PUFAs) and xanthophylls, two molecular families widely studied for their bioactivities in the fields of nutrition and cosmetics. Whereas most studies separately deal with the two families, synergies could be exploited with extracts containing both PUFAs and xanthophylls. The purpose of our work was to determine cost effective and eco-friendly parameters for their co-extraction. The effect of several parameters (solvent, solvent/biomass ratio, temperature, duration) were studied, using two microalgal species, the non-calcifying Haptophyta Tisochrysis lutea, and the diatom Phaeodactylum tricornutum, that presents a silicified frustule. Analyses of PUFAs and fucoxanthin (Fx), the main xanthophyll, allowed to compare kinetics and extraction yields between experimental protocols. Co-extraction yields achieved using 96% ethanol as solvent were 100% for Fx and docosahexaenoic acid (DHA) in one hour from T. lutea biomass, and respectively 95% and 89% for Fx and eicosapentaenoic acid (EPA) in eight hours from P. tricornutum. These conditions are compatible with industrial applications.

Mots clés: Polyunsaturated fatty acids; Fucoxanthin; Tisochrysis lutea; Phaeodactylum tricornutum; Green solvents; Food; Cosmetics; Microalgae; polyunsaturated fatty acid; xanthophyll; experimental protocol

Mots clés: micro-algue; acide gras polyinsaturé; xanthophylle; écoprocédé; protocole expérimental

Domaines: Ingénierie des aliments

Antoine Delbrut, Pierre Albina, Théo Lapierre, Rémi Pradelles, Eric Dubreucq. Fucoxanthin and Polyunsaturated Fatty Acids Co-Extraction by a Green Process. Molecules, 2018, 23 (4), pp.874. ⟨10.3390/molecules23040874⟩. ⟨hal-01918018⟩