Metals play a large role in the overall composition of wine. Within the wine matrix, metals form complexes with different ligands present such as organic acids, phenols, alcohols, and sugars. These complexes have direct effects on the overall perception of the wine adding to its aroma, flavor, and appearance. While it is know that metal complexes exist within the wine, the exact species are not known. Results from complexation of phenolic compounds quercetin, hesperidin methyl chalcone, umbelliferone, esculetin, and naringenin with metal salts of iron, copper, zinc, lead, aluminum, and/or magnesium will be discussed as our contribution to the understanding of complex composition and complexation equilibria present in wine.

Methodical study of metal-phenolic complexes in wine

243rd National Meeting (2012)

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