Micro-Element Analysis in Wine and Grapes

Complexing capacity profiles of naturally occurring ligands in Tempranillo wines for Cu and Zn

“…anthocyanins and tannins, and accordingly a good number of papers have been released in which wine composition has been analysed for different varieties, origins and viticulture practices [2][3][4][5]. Metals present in the wine matrix play a substantial role as yeast cofactor [6], oligoelements [7] metallic targets for complexes [8], and fingerprints of geographical origin of wine [9]. Oenological attention devoted to metals has been extensively centred on the ferric and cupric cases [10], and the possible toxicity of certain heavy metals arising from the cultivation area and its environment [11][12].…”

Electrochemical and theoretical complexation studies for Zn and Cu with individual polyphenols

“…However, many different authors found interesting the study of the inorganic fraction, less abundant [1] but made up of different elements which play an important role, both on the vine growth and on the nutritional and organoleptic characteristics of wine [2].Total metal content in wine has typically been evaluated through different analytical techniques [2][3][4] for the role they play, i.e. as micronutrients and flavour enhancers, their toxic relevance, i.e.…”

“Enological” Metal Speciation Analysis

“…The application of smaller-pore-size filters makes further differentiation between molecules according to their molecular weight possible (3,4). After filtration, the metal contents of different liquid fractions can be determined (5).…”