Abstract
A critical revision is made on recent applications of voltammetric electronic tongues in the field of food analysis. Relevant works are discussed dealing with the discrimination of food samples of different type, origin, age and quality and with the prediction of the concentration of key substances and significant indexes related to food quality.
Highlights
Electronic noses and electronic tongues are bioinspired devices created during the 1980’s as a successful encounter of electronics and electrochemistry with chemometrics
Electronic noses and tongues are employed in many research fields such as environmental monitoring [7], pharmacy [8] or biotechnology [9], these devices have been mostly focused on food analysis [10,11,12,13]
In the field of food control, voltammetric electronic tongues are a promising complement for the more widely used potentiometric electronic tongues and electronic noses, especially in these really complex situations demanding a higher amount of information
Summary
Electronic noses and electronic tongues are bioinspired devices created during the 1980’s as a successful encounter of electronics and electrochemistry with chemometrics. The same data sets used for sample discrimination can be processed by multivariate calibration methods like PLS to predict certain parameters related to food quality For this purpose, it is necessary to measure the target parameter in the known samples and include the resulting values in the calibration model. The application of PCA to this kind of data allowed the authors to clearly discriminate among liqueurs made from different varieties of apple, as shown by Figure 3 This is a 3D plot of the scores achieved by the three samples of every apple variety for the three first principal components of the model (PC1, PC2 and PC3).
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