In linear-sweep voltammetry and related techniques, the empirical quantity defined
by the equation
where

is the
peak current,
A is the area of the electrode-solution
interface,

is the rate of change of
applied potential, and

is the bulk concentration of the substance B whose reduction or
oxidation is responsible for the peak in question.
Source:
PAC, 1985, 57, 1491
(Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations
1985))
on page 1505