Electronic Tongue: New Tool for Food Analysis Based a PSoC (Programmable System-on-Chip) Technology

摘要

The aim of this study is to show the development of a signals processing system on a single chip, based on PSoC technology, as stage of a portable electronic tongue, with the aim to discriminate samples of some substances according to their taste properties. The system applies a technique called cyclic voltammetry in order to obtain signals from a substance through of an electrochemical sensors array, these signals are processed and transmitted via bluetooth to a Smartphone with Android operating systems, where it is possible to look the behavior of the electrochemical sensors array front the analyzed substances. The cyclic voltammetry was applied to samples of saccharose and milk, using an electrochemical measurement device and the prototype developed; it was possible to check that both devices described the same behavior of the samples. On the other hand, the system was confronted with samples of milk, lactic acid and saccharose, where was possible to note the capability of this system to offer single response in front of different substances, which is a vital result thereof when discriminating a liquid substance according its flavor.