title: Tannin structural elucidation and quantitative ³¹P NMR analysis. 2. Hydrolyzable tannins and proanthocyanidins.
abstract: An unprecedented analytical method that allows simultaneous structural and quantitative characterization of all functional groups present in tannins is reported. In situ labeling of all labile H groups (aliphatic and phenolic hydroxyls and carboxylic acids) with a phosphorus-containing reagent (Cl-TMDP) followed by quantitative ³¹P NMR acquisition constitutes a novel fast and reliable analytical tool for the analysis of tannins and proanthocyanidins with significant implications for the fields of food and feed analyses, tannery, and the development of natural polyphenolics containing products.
authors.affiliation: Department of Chemical Sciences and Technologies, University of Rome 'Tor Vergata' , Via della Ricerca Scientifica, 00133 Rome, Italy.
authors.forename: Federica
authors.initials: F
authors.lastname: Melone
authors.forename: Raffaele
authors.initials: R
authors.lastname: Saladino
authors.forename: Heiko
authors.initials: H
authors.lastname: Lange
authors.forename: Claudia
authors.initials: C
authors.lastname: Crestini
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000378:metabolism; D002392:Catechin / Q000737:chemistry / Q000378:metabolism; D002622:Chemistry, Agricultural / Q000379:methods*; D005504:Food Analysis / Q000379:methods; D047348:Hydrolyzable Tannins / Q000737:chemistry* / Q000378:metabolism; D007553:Isotope Labeling; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010759:Phosphorus Isotopes; D044945:Proanthocyanidins / Q000737:chemistry* / Q000378:metabolism; D012995:Solubility
chemical_list: D000975:Antioxidants; D047348:Hydrolyzable Tannins; D010759:Phosphorus Isotopes; D044945:Proanthocyanidins; D002392:Catechin