Levich constant explained

A Levich constant (B) is often used in order to simplify the Levich equation.^[1] Furthermore, B is readily extracted from rotating disk electrode experimental data.

The B can be defined as:^[2]

B = ( 0 . 620 ) n F A D ^{(2)/(3)} v ^{(-1)/(6)} C

where

• n is the number of moles of electrons transferred in the half reaction (number)
• F is the Faraday constant (C/mol)
• A is the electrode area (cm²)
• D is the diffusion coefficient (see Fick's law of diffusion) (cm²/s)
• v is the kinematic viscosity (cm²/s)
• C is the analyte concentration (mol/cm³)

Notes and References

1. Book: Electrochemical Methods: Fundamentals and Applications. Bard. Allen. Faulkner. Larry. J. Wiley and Sons. 2000. 978-0-471-04372-0.
2. Wiberg. Gustav K. H.. Zana. Alessandro. 12 October 2016. Levich Analysis and the Apparent Potential Dependency of the Levich B Factor. Analytical Letters. 49. 15. 2397–2404. 10.1080/00032719.2016.1149188. 100762397. 0003-2719.