Electronic tongue based on porphyrins for Apulian red wines defects detection

Electronic tongue based on porphyrin coatings obtained by electrochemical polymerization process was employed for the detection of Apulian wines (Primitivo and Negroamaro) defects related to the presence of “off-odor” methiol (3-(methylthio)-propanol) and ethyl phenol compounds, isoamyl alcohol fusel oil, the marker of the yeast activity benzaldehyde and vinegar formation marker acetic acid. The satisfactory prediction with R 2 0.989 and 0.732 for isoamyl alcohol and acetic acid were obtained for in real wine samples. Moreover, the possibility to distinguish wine samples on the base of permitted levels of fault compounds content was shown.