Open AccessAn Analytical Toolbox for Fast and Straightforward Structural Characterisation of Commercially Available Tannins
Author(s) -
Lili Zhen,
Heiko Lange,
Claudia Crestini
Publication year - 2021
Publication title -
molecules/molecules online/molecules annual
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 149
eISSN - 1433-1373
pISSN - 1420-3049
DOI - 10.3390/molecules26092532
Subject(s) - biochemical engineering , chemistry , proanthocyanidin , polyphenol , heteronuclear single quantum coherence spectroscopy , toolbox , chromatography , nuclear magnetic resonance spectroscopy , organic chemistry , computer science , engineering , programming language , antioxidant
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 31 P 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.