title: Iterative Precise Conductivity Measurement with IDEs.
abstract: The paper presents a new approach in the field of precise electrolytic conductivity measurements with planar thin- and thick-film electrodes. This novel measuring method was developed for measurement with comb-like electrodes called interdigitated electrodes (IDEs). Correction characteristics over a wide range of specific conductivities were determined from an interface impedance characterization of the thick-film IDEs. The local maximum of the capacitive part of the interface impedance is used for corrections to get linear responses. The measuring frequency was determined at a wide range of measured conductivity. An iteration mode of measurements was suggested to precisely measure the conductivity at the right frequency in order to achieve a highly accurate response. The method takes precise conductivity measurements in concentration ranges from 10(-6) to 1 M without electrode cell replacement.
authors.affiliation: Centre of Sensors, Information and Communication Systems, Faculty of Electrical Engineering and Communication, Technicka 3058/10, Brno 616 00, Czech Republic. hubalek@feec.vutbr.cz.
authors.forename: Jaromír
authors.initials: J
authors.lastname: Hubálek
keywords: IDEs; cell constant correction; electrolytic conductance; iterative measurement; specific conductivity