THE OPTIMIZATION OF ANTIOXIDANTS EXTRACTION FROM WINERY WASTE

Winery waste represents an important source of bioactive compounds that exhibit antioxidantproperties and important antiradical activity. The concentration of ethyl alcohol in extractionenvironment has a significant influence on the rate of extraction and bioactive compounds as well asonto the measured parameters: the antioxidant activity of water-soluble substances; the antioxidantactivity of fat-soluble substances; the total content of anthocyanins; total polyphenol index; the amountof tannins extracted; the DPPH antiradical activity and the ability of inhibiting hydrogen peroxide in anacid and in basic medium. On the basis of experimental data and by using the corresponding calculationrelations, the first-order statistical characteristics were determined. The analysis of the trial data showedthe existence of non-linear dependencies therefore, the spline functions were used to establish themathematical models. The analysis of the information provided by the experimental data obtainedallows the determining of influences of various parameters measured during the tests