Determination of buffer capacity by means of an ISFET-based coulometric sensor-actuator system with a gate-covering porous actuator

J. Luo, W. Olthuis, P. Bergveld, M. Bos, W.E. van der Linden

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    Abstract

    In this paper we propose a dynamic way to measure the buffer capacity of an electrolyte by means of an ISFET-based coulometric sensor-actuator system whose gate is covered with a porous actuator. A theoterical model for this measurement is presented. Experiments are carried out in nitric and acetic acid as well as in phosphoric acid solutions. A fairly good agreement has been found between the theoretical calculations and the experimental results.
    Original languageEnglish
    Pages (from-to)7-15
    JournalSensors and actuators. B: Chemical
    Volume20
    Issue number1
    DOIs
    Publication statusPublished - 1994

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