Anson equation

In electrochemistry, the Anson equation defines the charge-time dependence for linear diffusion control in chronocoulometry.

The Anson equation is written as:


 * $$Q = nFACD^{1/2}\pi^{-1/2}t^{1/2}$$

where,
 * Q = charge in coulombs
 * n = number of electrons (to reduce/oxidize one molecule of analyte)
 * F = Faraday constant, 96485 C/mol
 * A = area of the (planar) electrode in cm2
 * C = concentration in mol/cm3;
 * D = diffusion coefficient in cm2/s
 * t = time in s.

This is related to the Cottrell equation via integration with respect to time (t), and similarly implies that the electrode is planar.