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Combining High-Pressure Methods for Extraction of Stilbenes from Grape Cane.

SYSNO ASEP	0495143
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Combining High-Pressure Methods for Extraction of Stilbenes from Grape Cane.
Author(s)	Zachová, Zdeňka (UCHP-M)_{RID, ORCID, SAI} Tříska, Jan (UEK-B)_{RID, ORCID, SAI} Vrchotová, Naděžda (UEK-B)_{RID, SAI, ORCID} Balík, J. (CZ) Sajfrtová, Marie (UCHP-M)_{RID, ORCID, SAI} Sovová, Helena (UCHP-M)_{RID, ORCID, SAI}
Source Title	Journal of Supercritical Fluids. - : Elsevier - ISSN 0896-8446 Roč. 142, DEC (2018), s. 38-44
Number of pages	7 s.
Language	eng - English
Country	NL - Netherlands
Keywords	viniferins ; resveratrol ; grape cane ; supercritical fluid extraction
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
OECD category	Chemical engineering (plants, products)
Subject RIV - cooperation	Global Change Research Institute - Analytical Chemistry, Separation
R&D Projects	LD14038 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UCHP-M - RVO:67985858 ; RVO:67179843 - RVO:67179843
UT WOS	000449896200005
EID SCOPUS	85047845682
DOI	10.1016/j.supflu.2018.05.021
Annotation	Stilbenes were extracted from grape cane using supercritical fluid extraction and pressurized liquid extraction, and the extracts were analysed by HPLC. The results of the high-pressure experiments were compared with ethanolic Soxhlet extraction, which yielded 2.31 mg/g dw trans-resveratrol, 1.56 mg/g dw trans-epsilon-viniferin, and 0.69 mg/g dw r2-viniferin. In contrast to resveratrol, the extraction of viniferins with supercritical CO2 required a high concentration of ethanol as co-solvent. Its increase from 15 to 20% at 30 MPa and 50 °C increased the rate of extraction of trans-epsilon-viniferin and r2-viniferin 4 times and 7 times, resp. The optimal conditions of pressurized liquid extraction were: ethanol as solvent, pressure 10 MPa, and temperature 100 °C for resveratrol and 80 °C for viniferins. The selectivity of supercritical fluid extraction and efficiency of extraction with pressurised ethanol were combined to obtain extracts of different mutual ratios of stilbenes.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2019

Number of the records: 1