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Updated: Mar 26, 2026

Potentiodynamic Corrosion Testing
Published on: September 4, 2016
In Situ Potentiometry and Ellipsometry: A Promising Tool to Study Biofouling of Potentiometric Sensors
Grzegorz Lisak1,2,3, Thomas Arnebrant2,3, Andrzej Lewenstam1,4
1Johan Gadolin Process Chemistry Centre, c/o Laboratory of Analytical Chemistry, Åbo Akademi University , FIN-20500 Åbo-Turku, Finland.
Abstract:
In situ potentiometry and null ellipsometry was combined and used as a tool to follow the kinetics of biofouling of ion-selective electrodes (ISEs). The study was performed using custom-made solid-contact K(+)-ISEs consisting of a gold surface with immobilized 6-(ferrocenyl)hexanethiol as ion-to-electron transducer that was coated with a potassium-selective plasticized polymer membrane. The electrode potential and the ellipsometric signal (corresponding to the amount of adsorbed protein) were recorded simultaneously during adsorption of bovine serum albumin (BSA) at the surface of the K(+)-ISEs. This in situ method may become useful in developing sensors with minimized biofouling.
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