INFLUENCE OF BENTONITE IN THE CHEMICAL COMPOSITION OF WINE WHEN USED FOR STABILITY

Abstract

It analyses the effect of commercial marks of bentonite in the chemical composit ion of vinifera wines. Two experiments were carr ied out. The first test used differents concentrations of one bentonite, and second test used two concentrations of four bentonites. The concentrat ion of bentonite were from o to 1. o g/L, and it was evaluated the following variables, especific to each experimento density, total acidity, pH, dry extract, ashes, alcalinity of ashes, I 420, I 520, turbidity and total N; K, Ca, Mg, Mn, Na, Fe, Cu, Zn, Li e P04. The results showed that the increasing of the bentonite concentration reduced, in general, the turbidity, the color index and the total N. The other classic analyses were a little bit affected. The most important variation observed in the mineraIs were the concentration increasing of Na, Fe and Li and the reduction of Cu and Zn.