Modified carbon paste electrodes for discrimination of vegetable oils

Moreover, the voltammograms are strongly influenced by the pH and by the nature of ions present in the electrolytic solutions where the electrodes are immersed. As a result, each type of oil can provide a variety of characteristic signals that can be used as the input variable of a principal component analysis (PCA). The results indicate that this method allows a clear discrimination among oils from different vegetal origins and also allows olive oils of different quality (extra virgin, virgin, lampante and refined olive oil) to be discriminated.