Evolution of metal and polyphenol content over a 1-year period of vinification:sample fractionation and correlation between metals and anthocyanins

摘要

Tempranillo grape variety (Vitis vinifera) samples obtained from a 0-345-day period of vinification were analysed.Fe,Cu,Zn and Mn were quantified as well as polyphenols and anthocyanins.A good correlation has been found for both Fe and Cu with total polyphenols and anthocyanins.A selected sample was fractionated through an open column,allowing the individual correlation of both Zn and Cu with cyanidin-3-glucoside to be established.? 2004 Elsevier B.V.All rights reserved.