Mechanism of Potential Development for Potentiometric Sensors, Based on Modeling of Interaction Between Electrochemically Active Compounds from the Membrane and Analyte

Tuesday, May 13, 2014: 09:00
Floridian Ballroom L, Lobby Level (Hilton Orlando Bonnet Creek)
R. I. Stefan-van Staden (Laboratory of Electrochemistry and PATLAB Bucharest, National Institute of Research for Electrochemistry and Condensed Matter)
Modeling of interaction between analyte and electrochemically active compounds represents a new theoretical approach to predict the response and mechanism of potential development for ion-selective membrane electrodes. Therefore, correlations between the parameters (e.g., free energy, HUMO, LUMO, bound lenght) obtained using modeling, and experimental results (e.g., slope, free energy) obtained using ion-selective electrodes will be shown for sensors based on fullerens. The influence of matrix of the ion-selective electrodes on their response and selectivity will be shown.

The very first results of this study (a new mechanism of potential development for ion-selective electrodes) were discussed with Professor Buck during his participation to a conference in Constantza, Romania in 1993. He was the first that recognized the value of this theoretical spects, and his comments were extremely valuable for the work I developed until now in the theoretical field of ion-selective membrane electrodes.

Acknowledgements This work was supported by UEFISCDI PNII Program Ideas 2011-2014, Contract nr. 123/05.10.2011.