Artículos de revistas
Supercritical Fluid Extraction Of Lemon Verbena (sf Aloysia Triphylla): Process Kinetics And Scale-up, Extract Chemical Composition And Antioxidant Activity, And Economic Evaluation
Separation Science And Technology (philadelphia). , v. 49, n. 4, p. 569 - 579, 2014.
The extract of lemon verbena (Aloysia triphylla) was obtained by supercritical fluid extraction (SFE) using laboratory and pilot scale equipments. The scale-up criterion selected (maintaining solvent to feed ratio constant) was successfully used for a 14-fold scale-up. The extract obtained in pilot scale was separated in three fractions, which were characterized as for their phytochemical profile, total flavonoids content, and antioxidant activity. The extracts obtained by SFE were compared to classical Soxhlet extraction method. Maximum yield obtained for SFE was 1.8%, and for Soxhlet, 7.1%. The chemical composition revealed different phytochemical profiles for SFE and Soxhlet extracts; the last ones presented more flavonoids, while SFE extracts were more concentrated in volatile compounds. The major compounds identified in the volatile fraction of the extracts were spathulenol, phytol and octadecatrienal. 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