In electrochemistry, the Anson equation defines the charge-time dependence for linear diffusion control in chronocoulometry.[1]

The Anson equation is written as:

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.

See also

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References

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  1. ^ Chronoamperometry/chronocoulometry - Data Analysis https://www.basinc.com/manuals/EC_epsilon/Techniques/ChronoI/ca_analysis