Microstructure elucidation of polyflavonoid tannins by MALDI‐TOF‐CID |
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| Authors: | Nonhlanhla Radebe Karsten Rode Antonio Pizzi Harald Pasch |
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| Affiliation: | 1. Department of Chemistry and Polymer Science, University of Stellenbosch, Stellenbosch 7602, South Africa;2. Deutsches Kunststoff‐Institut, Schlossgartenstr. 6, 64289 Darmstadt, Germany;3. ENSTIB‐LERMAB, University of Lorraine, 27 Rue Philippe Seguin, 88051 Epinal Cedex, France |
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| Abstract: | High molar mass wood tannin extracts are complex mixtures that are distributed in both molar mass and chemical composition. Condensed tannins from quebracho and mimosa woods were analyzed and compared with cacao tannins using matrix‐assisted laser desorption/ionization‐time of flight (MALDI‐TOF) mass spectrometry. Although MALDI‐TOF MS reveals the oligomer structure of the tannins, this method cannot distinguish between isomers with isobaric masses, and therefore, ambiguous structural assignments were made in a number of cases. To determine the actual microstructures present, MALDI‐TOF collision‐induced dissociation (CID) experiments were conducted. MALDI‐TOF‐CID enables monomer sequence determination, and positive assignments of isobaric structures can be made. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
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| Keywords: | MALDI‐TOF collision‐induced dissociation tannins polyflavonoids |
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