A STUDY OF THE PHYSICOCHEMICAL PROPERTIES OF SOME OXIDIZED ENOTANNINS

Natalia PETROV Institutul de Chimie

Abstract

New samples of Enoxil (Enoxil I, Enoxil II and Enoxil III) were obtained by oxidation of enotannins. The antioxidant properties of enotannins and Enoxils were determined by means of the chemiluminescence method. It was demonstrated that the antioxidant activity of novel chemical compounds is by 29-32% more pronounced than that of enotannins used as raw material. 

By applying the potentiometric method of "Boehm titrations" the amount of acidic functional groups (carboxyl and phenolic) in enotannins and the mentioned Enoxil preparations was determined. The obtained results reveal that new substances contain about 3-4 times more acidic functional groups than Enotannins. 

Keywords: chemiluminescence, antioxidant, polyphenols, enotannins.