Abstract: The aim of this research was to evaluate the application of a voltammetric electronic tongue device based on PSoC technology and polypyrrole sensor array in the analysis of milk samples contaminated with herbicides. The analysis was carried out on samples contaminated with glyphosate and terbutryn and a voltammetric electronic tongue device equipped with a sensor array made of modified polypyrrole with different doping ions. The data were analyzed by principal component analysis and cluster analysis to evaluate the discrimination capacity and with partial least squares to explore the capacity of prediction of contaminant concentration. The results showed an excellent discrimination capacity when applying the methods of principal component analysis and cluster analysis. In addition, in both cases the spatial distribution of the samples was consistent with expected with the contaminant concentration. On the other hand when applying the partial least squares analysis, a good correlation and concentration values predicted by the electronic tongue were very close to the real concentrations. The electronic tongue device can be used as an analytical alternative to determine contaminants such as glyphosate and terbutryn.
Arrieta Alvaro, Arrieta Pedro and Palencia Manuel, 2018. Classification and Analytical Evaluation of Raw Milk Contaminated with Herbicides Through the Application of a Voltammetric Electronic Tongue. Research Journal of Applied Sciences, 13: 452-459.