Application of Deep Eutectic Solvents and Ionic Liquids in the Extraction of Catechins from Tea
1
Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 6, 44-100 Gliwice, Poland
2
Biotechnology Center of Silesian University of Technology, Krzywoustego 8, 44-100 Gliwice, Poland
3
Department of Organic and Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Victoria Samanidou
Molecules 2020, 25(14), 3216; https://doi.org/10.3390/molecules25143216
Received: 18 June 2020 / Revised: 9 July 2020 / Accepted: 10 July 2020 / Published: 14 July 2020
(This article belongs to the Special Issue Sample Preparation-Quo Vadis: Current Status of Sample Preparation Approaches)
This work aimed to comprehensively evaluate the potential and effectiveness of deep eutectic solvents (DESs) in the extraction of seven catechins from various tea samples. Different combinations of DES were used, consisting of Girard’s reagent T (GrT) in various mixing ratios with organic acids and choline chloride. The yields of the DES extractions were compared with those from ionic liquids and conventional solvent. DES contained malic acid, as the hydrogen bond donors showed a good solubility of catechins with different polarities. In the second part of the study, a solid-phase extraction (SPE) method was applied to the extraction of catechins from tea infusions. The method was applied to the determination of selected catechins in tea leaves and tea infusions. Furthermore, we demonstrated that the proposed procedure works well in the simultaneous monitoring of these polyphenols, which makes it a useful tool in the quality control of tea.
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Keywords:
green extraction; deep eutectic solvents; ionic liquids; catechins; tea leaves
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MDPI and ACS Style
Bajkacz, S.; Adamek, J.; Sobska, A. Application of Deep Eutectic Solvents and Ionic Liquids in the Extraction of Catechins from Tea. Molecules 2020, 25, 3216. https://doi.org/10.3390/molecules25143216
AMA Style
Bajkacz S, Adamek J, Sobska A. Application of Deep Eutectic Solvents and Ionic Liquids in the Extraction of Catechins from Tea. Molecules. 2020; 25(14):3216. https://doi.org/10.3390/molecules25143216
Chicago/Turabian StyleBajkacz, Sylwia; Adamek, Jakub; Sobska, Anna. 2020. "Application of Deep Eutectic Solvents and Ionic Liquids in the Extraction of Catechins from Tea" Molecules 25, no. 14: 3216. https://doi.org/10.3390/molecules25143216
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