Solid‐State Microelectrodes for Flow‐Cell Analysis Based on Planar Back‐Side Contact Transducers

Abstract

AbstractThis paper presents an overview of the studies carried out in the recent years in our laboratory, on the construction of different solid‐state microelectrodes for flow‐cell analysis. The microelectrodes were based on planar transducers made from a printed circuit board and manufactured as back‐side contact structures, which facilitate their mounting in a flow‐cell. Performances of the polymeric membrane ion‐selective: coated‐wire microelectrodes and microsensors with a polyHEMA layer containing internal electrolyte are compared. Conducting polymer – polypyrrole doped with ester of sulfosuccinic acid – was added to the PVC membranes to develop all‐solid‐state microelectrodes without internal electrolyte solution, exhibiting good potential stability in time. Finally, all‐solid‐state reference microelectrodes based on back‐side contact transducers are prepared and examined. These structures were applied as reference electrodes in flow‐cell measurements with potassium‐selective planar microelectrodes.