Levich constant

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]

${\displaystyle B=(0.620)nFAD^{\frac {2}{3}}v^{\frac {-1}{6}}C}$

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)

References

1. Bard, Allen; Faulkner, Larry (2000). Electrochemical Methods: Fundamentals and Applications. J. Wiley and Sons. ISBN 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. doi:10.1080/00032719.2016.1149188. ISSN 0003-2719. S2CID 100762397.