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Vitis roots contain monomer and oligomer of resveratrol derivatives, but the stilbenic fraction contain other unknown compounds. We used the HPLC-DAD as a convenient tool for quantification, but in this paper we demonstrated that UV spectra of chromatographic peaks can give useful information on the structure of unknown oligostilbenes. With the increase of the degree of polymerization the relative intensity of the bands at 230 and 326 nm change, and a linear positive correlation between the A230/A326 ratio and the number of the stilbenic units of the oligomers was found. The result of this study let us to classify the unknown compounds as resveratrol oligomers bearing 7, 4, and 3 units.

Additional information

Authors: MATTIVI F, Instituto Agrario, Dipartimento Lab Analisi e Ricerche, S Michele all Adige (IT);RENIERO F, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 18th International Conference on Polyphenols, Bordeaux (FR) July 15-18, 1996
Availability: Available from (1) as Paper EN 39976 ORA
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