Comparative Study of the Total Acidity Determination in Wine by Potentiometric and Volumetric Titration

Total acidity was determined in thirty-seven samples of Croatian red, white and rosé wines by potentiometric titration. In order to find the effect of the corresponding rate of the automatic titrant added, several procedures were employed. For different rates of titration, the aberrances were found from 0.1 to 0.4 g L–1 for some wines. The value of the total acid content in wine determined by the automatic potentiometric titration method was compared to that obtained by the conventional volumetric titration method. The ANOVA and cluster analysis (CA) were applied to detect possible resemblance. The results of total acidity depended on the methods used. However, a good correlation between the results by these methods was found