Furanolysis with Menthofuran: A New Depolymerization Method for Analyzing Condensed Tannins - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Agricultural and Food Chemistry Année : 2020

Furanolysis with Menthofuran: A New Depolymerization Method for Analyzing Condensed Tannins

Résumé

An improved analytical depolymerization method for characterizing condensed tannins was developed with menthofuran (3,6-dimethyl-4,5,6,7-tetrahydro-1-benzofuran) as the nucleophilic trapping reagent. Herein, menthofuran was compared with routinely used nucleophiles, phloroglucinol and 2-mercaptoethanol. At 30°C and in the presence of 0.1 M HCl, menthofuran displayed the outstanding ability to enable the fast and full depolymerization of procyanidin B2 using only a 1:1 molar ratio of both reactants. In the same conditions, phloroglucinol and 2 mercaptoethanol led to a reaction equilibrium with significantly lower conversion yields. Application to commercial tannin extracts showed that a menthofuran to extract weight ratio of 1 gave the same yields of procyanidin constitutive units as 10-fold higher mol. eq. phloroglucinol and 100 fold 2-mercaptoethanol. Finally, guidelines for implementing the menthofuran depolymerization method are proposed to assess the tannin content and composition of extracts as well as of plant materials without prior extraction.
Fichier principal
Vignette du fichier
Billerach_postprint_2019.pdf (561.8 Ko) Télécharger le fichier
Billerach_postprint_2019_Suppl.pdf (499.33 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02295527 , version 1 (24-09-2019)

Identifiants

Citer

Guillaume Billerach, Laurent Roumeas, Eric Dubreucq, Hélène Fulcrand. Furanolysis with Menthofuran: A New Depolymerization Method for Analyzing Condensed Tannins. Journal of Agricultural and Food Chemistry, 2020, 68 (10), pp.2917-2926. ⟨10.1021/acs.jafc.9b00497⟩. ⟨hal-02295527⟩
118 Consultations
370 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More