Abstract
The use of sulphur dioxide (SO2) in the treatment of foodstuffs presents some problems as it could lead to pseudo-allergies in some people. The aim of this research work was to study the addition of different preservative mixtures and their influence on the concentration of volatile compounds and sensorial quality in wine. To do so, vinifications were carried out using Garnacha must to which lysozyme, dimethyl dicarbonate (DMDC) and mixtures of these with SO2 were added at different doses (25 and 50 mg l−1). The results were compared with a control sample to which only SO2 had been added (50 mg l−1). In general, mixtures of SO2 with lysozyme and DMDC favoured the formation of volatile compounds in the wines. Wines obtained from the mixtures of lysozyme and DMDC with 25 mg l−1 of SO2 had better sensorial quality than the wines obtained with 50 mg l−1 as the only preservative used.
Acknowledgements
The authors express their sincere appreciation to those experts from the Department of Food Technology at the Public University of Navarre (UPNa) who participated in the wine-tasting for this study.