At the microelectrode, the redox reaction occurs:

. Because the microelectrode is very small, the steady state is quickly attained. If the standard rate constant of the reaction redox on the microelectrode is very rapid (

), we have a reversible voltammogram.

According to [1], the reversible steady-state voltammogram satisfies the equation

, where

is the limiting current of the microelectrode,

,

(

) is the diffusion coefficient of the oxidant and reducer,

(

m) is the radius of the microelectrode,

(V) is the standard potential of reaction redox,

(V) is the applied potential,

is the gas constant

,

is the Faraday constant

(C/mol), C (mol/L) is the concentration of oxidant,

(K) is the temperature, and

is the number of electrons transferred.

[1] A. M. Bond, K. B. Oldham, and C. G. Zoski, "Theory of Electrochemical Processes at an Inlaid Disc Microelectrode under Steady-State Conditions,"

*J. Electroanal. Chem.*,

**245**(1–2), 1988 p. 71.