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Article

An Analytical Toolbox for Fast and Straightforward Structural Characterisation of Commercially Available Tannins

by 1,2, 2,3,*,† and 2,4,*,†
1
Department of Chemical Science and Technologies, University of Rome ‘Tor Vergata’, Via della Ricerca Scientifica, 00133 Rome, Italy
2
CSGI-Center for Colloid and Surface Science, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
3
Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milan, Italy
4
Department of Molecular Sciences and Nanosystems, University of Venice ‘Ca’Foscari’, Via Torino 155, 30170 Venice Mestre, Italy
*
Authors to whom correspondence should be addressed.
Affiliated with 1 via NAST—Nanoscience & Nanotechnology & Innovative Instrumentation Center.
Academic Editors: Jose A. Mendiola and Teresa Escribano-Bailón
Molecules 2021, 26(9), 2532; https://doi.org/10.3390/molecules26092532
Received: 19 March 2021 / Revised: 9 April 2021 / Accepted: 21 April 2021 / Published: 26 April 2021
Both condensed and hydrolysable tannins represent versatile natural polyphenolic structures exhibiting a broad range of activities that could be exploited in various fields including nutraceutics, cosmesis, consumer care, household and pharmaceutical applications. Various tannins are commercially available nowadays for use in such application fields. We have analysed a representative selection of commercially available condensed and hydrolysable tannins for structural features and purity. Using a combination of quantitative 31P NMR spectroscopy, HSQC measurements, MALDI-ToF analyses, gel permeation chromatography and wet chemical analysis, detailed structural characterisations and descriptions were possible, allowing for verification and falsification of claimed structural features. View Full-Text
Keywords: condensed tannins; hydrolysable tannins; 31P NMR; HSQC; MALDI-ToF condensed tannins; hydrolysable tannins; 31P NMR; HSQC; MALDI-ToF
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MDPI and ACS Style

Zhen, L.; Lange, H.; Crestini, C. An Analytical Toolbox for Fast and Straightforward Structural Characterisation of Commercially Available Tannins. Molecules 2021, 26, 2532. https://doi.org/10.3390/molecules26092532

AMA Style

Zhen L, Lange H, Crestini C. An Analytical Toolbox for Fast and Straightforward Structural Characterisation of Commercially Available Tannins. Molecules. 2021; 26(9):2532. https://doi.org/10.3390/molecules26092532

Chicago/Turabian Style

Zhen, Lili, Heiko Lange, and Claudia Crestini. 2021. "An Analytical Toolbox for Fast and Straightforward Structural Characterisation of Commercially Available Tannins" Molecules 26, no. 9: 2532. https://doi.org/10.3390/molecules26092532

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