Potentiometric electronic tongue based on integrated array of microelectrodes

An integrated array of solid-state ion-sensitive microelectrodes was applied for the construction of planar electronic tongue. The fabrication of the device based on PCB technology was described—the method is simple, fast and not expensive. The ion-selective sensor array was obtained by the deposition of PVC membranes, exhibiting different sensitivities towards various ionic species, on the surface of planar Au microelectrodes. The miniaturized electronic tongue system was checked in the recognition of a brand of orange juice. High ability of the system for the recognition of juice origin was noticed.