DETERMINATION OF BUFFER CAPACITY BY MEANS OF AN ISFET-BASED COULOMETRIC SENSOR ACTUATOR SYSTEM WITH A GATE-COVERING POROUS ACTUATOR

In this paper we propose a dynamic way to measure the buffer capacity of an electrolyte by means of an ISFET-based coulometric sensor-actuat or system whose gate is covered with a porous actuator. A theoretical model for this measurement is presented. Experiments are carried out i n nitric and acetic acid as well as in phosphoric acid solutions. A fa irly good agreement has been found between the theoretical calculation s and the experimental results.