Voltammetric ion-selective electrodes (VISE)

Voltammetric ion-selective electrodes (VISE) based on a traditional princip le with internal electrolyte as well as solid-state devices in the form of electrochemical one-shot teststrip are developed. In the latter the interfe ring polarization at the solid-state backside contact can be avoided by inc reasing the contact area and thus decreasing the current density a. this in terface drastically as compared to the interface ISE-membrane/sample. The c hemically modified electrodes described here will hopefully replace the hig hly toxic mercury electrodes used in stripping analysis. In the development of highly reproducible screen-printed VISE, controlling the area of the ac tive membrane surface is much easier. Therefore, it is possible to produce many VISE with absolutely identical features opening the route to precalibr ated devices without any need for additional recalibration by the end user.