Comparative Assessment of Phytochemical Profiles of Comfrey (Symphytum offcinale L.) Root Extracts Obtained by Different Extraction Techniques
Metadatos
Afficher la notice complèteAuteur
Nastic, Natasa; Borras Linares, María Isabel; Lozano Sánchez, Jesús; Svarc Gajic, Jaroslava; Segura Carretero, AntonioEditorial
MDPI
Materia
Comfrey (Symphytum offcinale L.) root Maceration Phytochemical compounds
Date
2020-02-14Referencia bibliográfica
Nastić, N., Borrás-Linares, I., Lozano-Sánchez, J., Švarc-Gajić, J., & Segura-Carretero, A. (2020). Comparative Assessment of Phytochemical Profiles of Comfrey (Symphytum officinale L.) Root Extracts Obtained by Different Extraction Techniques. Molecules, 25(4), 837.
Patrocinador
This work was funded by the project financially supported by the Serbian Ministry of Education, Science and Technological Development (TR 31014), the Andalusian Regional Government Council of Innovation and Science (P11-CTS-7625), the Spanish Ministry of Economy and Competitiveness (MINECO) (AGL2015-67995-C3-2, IJCI-2015-26789, and PTQ-13-06429), and the European Social Fund (FSE) (PTQ-13-06429).Résumé
In this work a comparative study on phytochemical profiles of comfrey root
extracts obtained by different extraction approaches has been carried out. Chemical profiles
of extracts obtained by supercritical fluid (SFE), pressurized liquid (PLE), and conventional
solid/liquid extraction were compared and discussed. Phytochemical composition was assessed by
high-performance liquid chromatography coupled with electrospray time-of-flight mass spectrometry
(HPLC-ESI-QTOF-MS/MS) identifying 39 compounds reported for the first time in comfrey root, mainly
phenolic acids and fatty acids. The influence of different extraction parameters on phytochemical
profiles of S. offcinale root was investigated for all applied techniques. PLE and maceration, using
alcohol-based solvents (aqueous methanol or ethanol), were shown to be more effcient in the recovery
of more polar compounds. Greater numbers of phenolics were best extracted by PLE using 85%
EtOH at 63 ºC. The use of SFE and 100% acetone for 30 min enabled good recoveries of nonpolar
compounds. SFE using 15% EtOH as a cosolvent at 150 bar produced the best recoveries of a
significant number of fatty acids. The main compositional differences between extracts obtained
by different extraction techniques were assigned to the solvent type. Hence, these results provided
comprehensive approaches for treating comfrey root enriched in different phytochemicals, thereby
enhancing its bioaccessibility.