Development of a novel electronic tongue system using sensor array based on polymer films for liquid phase testing

A novel electronic tongue system had been developed recently in our labs, which was based on impedance measurements of a hybrid sensor array of different polymer films either conjugated conducting polymers (CPs) or rendered conductive polymers by the addition of carbon black (CB) or single wall carbon nanotubes (CNT). In this work, preliminary experiments were carried out on a series of measurements of liquids containing different concentrations of acid (HCl), salt (NaCl), glucose, ethanol and a bitter substance (sodium dehydrocholate).The impedance data have been processed using principal component analysis(PCA) algorithm. The preliminary results demonstrate the feasibility of artificial taste sensing using the polymer films sensory array