Natural Deep Eutectic Solvents as Alternatives for Extracting Phlorotannins from Brown Algae


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Natural deep eutectic solvents (NADES) are promising green solvents for extracting biologically active compounds from plant raw material. This is the first study in which NADES were used to extract phlorotannins from brown algae Fucus vesiculosus L. and Ascophyllum nodosum (L.) Le Jolis. The extraction efficiency of polyphenols was evaluated using 10 NADES based on choline chloride, lactic acid, betaine, and glucose in various mole ratios. The effect of H2O in aqueous solutions of NADES on extraction of phlorotannins was studied. Algae were extracted by maceration for 120 min at 50°C with a 1:5 raw-material:extractant ratio. Phlorotannins were quantified by spectrophotometry using the Folin–Ciocalteu method. The maximum extraction of phlorotannins (60 – 72%) was achieved using aqueous NADES solutions (50 – 70%) based on choline chloride with added lactic or malic acid and also on malic acid and betaine. The NADES had efficiencies comparable to Me2CO and EtOH.

Sobre autores

E. Obluchinskaya

Murmansk Marine Biological Institute, Kola Scientific Center, Russian Academy of Sciences

Autor responsável pela correspondência
Email: spb.pharmacy@gmail.com
Rússia, 17 Vladimirskaya St., Murmansk, 183010

A. Daurtseva

Murmansk Marine Biological Institute, Kola Scientific Center, Russian Academy of Sciences

Email: spb.pharmacy@gmail.com
Rússia, 17 Vladimirskaya St., Murmansk, 183010

O. Pozharitskaya

St. Petersburg Institute of Pharmacy

Email: spb.pharmacy@gmail.com
Rússia, Bldg. 245, Kuzmolovo, Vsevolozhsk District, Leningrad Oblast, 188663

E. Flisyuk

St. Petersburg State Chemical Pharmaceutical University

Email: spb.pharmacy@gmail.com
Rússia, 14 Prof. Popov St., St. Petersburg, 197376

A. Shikov

St. Petersburg Institute of Pharmacy; St. Petersburg State Chemical Pharmaceutical University

Email: spb.pharmacy@gmail.com
Rússia, Bldg. 245, Kuzmolovo, Vsevolozhsk District, Leningrad Oblast, 188663; 14 Prof. Popov St., St. Petersburg, 197376

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