Extraction of Stilbenes from Wine Industry Waste.

0490482 - ÚCHP 2019 FR eng C - Konferenční příspěvek (zahraniční konf.)
Zachová, Zdeňka - Topiař, Martin - Sajfrtová, Marie - Sovová, Helena
Extraction of Stilbenes from Wine Industry Waste.
Book of Abstracts. Louvain-la-Neuve: Université catholique de Louvain, 2018 - (Gaigneux, E.), s. 253. ISBN N.
[International Symposium on Supercritical Fluids /12./. Antibes-Juan-Les-Pins (FR), 22.04.2018-25.04.2018]
Grant CEP: GA TA ČR(CZ) TJ01000249
Institucionální podpora: RVO:67985858
Klíčová slova: supercritical fluid extraction * wine-processing industry * stibenes
Obor OECD: Chemical engineering (plants, products)

Our work compares the efficiency of pressurized solvent extraction (PSE), supercritical fluid extraction (SFE), and Soxhlet extraction of resveratrol and two viniferins from grape cane. The chemical composition of all plant isolates was determined by HPLC. Conditions of PSE, the most efficient method for the extraction of stilbenes, were optimized. The SFE of viniferins was enabled by adding to supercritical C02 ethanol as entraîner. Even then, the SFE of highly polar viniferins was not complete. On the other hand, the combination of SFE and PSE could be used to prepare extracts of tailored mutual ratio of trans-resveratrol, r2-viniferin, and trans-e-viniferin (Fig. I).
Trvalý link: http://hdl.handle.net/11104/0284711