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Advisor(s)
Abstract(s)
This work investigates the prospects for exploitation of Gnaphalium viscosum (Kunth)
abundant but with limited applications till present biomass. The feasibility of traditional techniques
(two-phase solvent, and the benchmark Soxhlet extraction) and supercritical extraction without/with
a cosolvent at T = 40–60 ◦C and p = 30–50 MPa was examined to explore the possibility of recovering
phytochemicals from G. viscosum leaves, flowers and stems. The efficiency of the techniques was
assessed and compared based on yield, influence of solvents used, total phenolic content and
antioxidant activity of the extracts. Phenolics of different complexities were identified and quantified
by applying LC (LC–MS/MS, and LC–HRAM), while the fatty acid profile was determined by GC–
FID. The results of this extensive study demonstrated the huge valorization potential and prospects
of G. viscosum, since highly potent antioxidants such as kaempferol-3-O-β-d-glucoside
(astragalin), and chlorogenic acid were ascertained in considerable amounts. Furthermore, for the
first time, the presence of leontopodic acid, a greatly substituted derivative of glucaric acid, was
detected in the species.
Description
Keywords
Mexican Gordolobo supercritical CO2 extraction phytochemicals antioxidants fatty acids biomass valorization
Citation
Boyadzhieva S, Coelho JAP, Errico M, Reynel-Avilla HE, Yankov DS, Bonilla-Petriciolet A, Stateva RP. Assessment of Gnaphalium viscosum (Kunth) Valorization Prospects: Sustainable Recovery of Antioxidants by Different Techniques. Antioxidants. 2022; 11(12):2495. https://doi.org/10.3390/antiox11122495
Publisher
MDPI