Extraction optimization, biological activities, and application in O/W emulsion of deep eutectic solvents-based phenolic extracts from olive pomace

Autor(es)

Pontes, Paula Virginia de Almeida ; Czaikoski, Aline ; Almeida, Naara Aparecida ; Fraga, Sara ; Rocha, Liliana de Oliveira ; Cunha, Rosiane Lopes ; Maximo, Guilherme Jose ; Batista, Eduardo Augusto Caldas

• Tipo de documento: Artigo Científico
• Fonte: Food Research International; v. 161, p. 14-pg., 2022-08-11.

Resumo

This study evaluated the phenolic compound extraction from olive pomace with deep eutectic solvents (DES) prepared with choline chloride ([Ch]Cl) and four (poly-)carboxylic acids. Temperature, water addition in the solvent, and solid-liquid ratio were evaluate in total phenolic content and antioxidant activity of extracts ob-tained with DES and ethanol, as control. Moreover, the antimicrobial activities of solvents and extracts were evaluated. Oil-in-water emulsion with DES extract was prepared, characterized and its oxidative stability analyzed. The extract with the highest total phenolic content was obtained with [Ch]Cl:malonic acid. Under optimal conditions, DES extracted 9 % more total phenolic content than ethanol. DES extract showed superior antibacterial activity to the ethanolic extract, and its presence in oil-in-water emulsion increased the induction time in 10-fold when compared to the one prepared with water. These results reinforce that DES are a potential solvent for phenolic compound extraction from olive pomace with antibacterial and technological benefits. (AU)

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