Abstract：
:UHPLC-LTQ-Orbitrap-high resolution mass spectrometry (HRMS) was applied to investigate complex polymeric polyphenols, before and after acid-catalysed depolymerisation in the presence of a nucleophile (phloroglucinol). Reaction products of (-)-epicatechin with acetaldehyde formed in model solution were selected for a proof-of concept experiment. The complexity of the UHPLC-HRMS dataset obtained after 4h incubation was reduced with petroleomics-inspired strategies using Van Krevelen diagrams and modified Kendrick mass defect filtering targeting ethyl-epicatechin (C17H16O6) units. Combining these approaches with mass fragmentation and phloroglucinolysis allowed us to describe reaction of epicatechin and acetaldehyde. More than 65 compounds were found, including the homogeneous bridged derivatives (up to the undecamer), vinyl and ethanol adducts, and xanthene and xanthylium salt derivatives which were identified for the first time.
journal_name
Food Chemjournal_title
Food chemistryauthors
Vallverdú-Queralt A,Meudec E,Eder M,Lamuela-Raventos RM,Sommerer N,Cheynier Vdoi
10.1016/j.foodchem.2017.01.106subject
Has Abstractpub_date
2017-07-15 00:00:00pages
255-263eissn
0308-8146issn
1873-7072pii
S0308-8146(17)30118-8journal_volume
227pub_type
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