Current Programs to Restore Ion-Selective Membrane Equilibrium
Justin M. Zook and Erno Lindner
Affiliation: Biochemical Science, NIST Gaithersburg, MD 20899.
Although ion-selective electrodes have traditionally been used at equilibrium, research interest in non-equilibrium uses has been growing. In these studies, an ion-selective membrane is often polarized by an external current to improve its detection limit, selectivity, and sensitivity. A drawback of these methods is that the membrane must be restored for a long time before each new measurement, and the theory has not been developed to predict restoration times. To determine the necessary relaxation times for various restoration protocols, we developed models describing the concentration profiles and voltage/current transients of ion-selective membranes during a sequence of current and/or voltage pulses.
Mentors Name: Wyatt Vreeland
Biochemical Science, CSTL
A363, 227, Mail stop 8313
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