The reduction of Cu(II)/neocuproine complexes by some polyphenols: Total polyphenols determination in wine samples

► A modified CUPRAC procedure was used to estimate the total polyphenols in wine. ► Fourteen wine samples were analysed and results expressed as tannic acid concentration. ► The proposed procedure is about 1.5 more sensitive than the Folin-Ciocalteu method. ► It is free from several interferences and does not require expensive equipments.