The development of chemical sensors operating in the liquid phase has been performed by deposition of thin film of metalloporphyrins onto glassy carbon electrodes by electropolymerization technique. An array of the developed Potentiometric sensors has been exploited for the analysis of real matrices. This array was able to discriminate among different brand of commercial mineral waters and among model sample contaminated by heavy metal salts. The developed electronic tongue was also successfully exploited for the discrimination among pharmaceutical drugs belonging to the same active principle but differing for excipients.
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