Analysis of Oligomeric and Polymeric Tannins of Grape Berries by Liquid Chromatography/Electrospray Ionization Multiple-Stage Tandem Mass Spectrometry
- 1 August 2001
- journal article
- Published by SAGE Publications in European Journal of Mass Spectrometry
- Vol. 7 (4-5) , 419-426
- https://doi.org/10.1255/ejms.452
Abstract
Tannins are highly polar, water-soluble and thermally-labile compounds which are difficult to ionize. Mass spectrometry is very useful for the structural determination of such compounds. In this article, we describe a sensitive method for the identification of tannic composition in grape berries (var. Gamaret). An ion trap, equipped with an electrospray ionization (ESI) interface, allowed us to develop multiple-stage fragmentation (MS n), which provided useful structural information. This technique was applied to a mixture of proanthocyanidins and proanthocyanidin gallate oligomers (B-type) generating identical ion sequences for each parent ion.Keywords
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