Anson equation

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In electrochemistry, the Anson equation defines the charge-time dependence for linear diffusion control in chronocoulometry.Chronoamperometry/chronocoulometry - Data Analysis https://www.basinc.com/manuals/EC_epsilon/Techniques/ChronoI/ca_analysis

The Anson equation is written as:

:$Q\; =\; 2nFACD^\{1/2\}\backslash pi^\{-1/2\}t^\{1/2\}$

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.