Abstract
An electronically regulated speed control unit has been programmed to produce an relation for disk and ring‐disk electrodes. Besides automatic hydrodynamic amperometry (Levich plots), one can perform two new techniques of hydrodynamic potentiometry: (a) recording of disk potential ( vs. ω½ at constant disk current ; and (b) recording of vs. at constant surface concentrations of all species, obtained by holding constant while scanning . The equations governing (a) are derived and the implications of (b) for measuring rate constants and/or uncompensated solution resistance are discussed.
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