Miniaturised multi-channel system of electrochemical measurements for an electronic tongue for milk samples

The development of a multi-channel system is described for electrochemical measurements as part of an electronic tongue fabricated using Programmable System on Chip (PSoC) technology. The purpose of this development is to offer the dairy sector a portable device that can perform the analysis of milk in situ. To obtain signals from a liquid substance, the acquisition circuitry acquires the signal using a variety of sensors, followed by the application of a technique known as cyclic voltammetry, which provides a characteristic pattern for each substance. During the testing, the system uses multivariate statistical methods to clearly differentiate between the characteristics of three types of milk, i.e. whole milk, semi-skimmed milk and lactose-free semi-skimmed milk.