Levich constant

{{Use dmy dates|date=October 2017}}

A Levich constant (B) is often used in order to simplify the Levich equation.{{Cite book|title=Electrochemical Methods: Fundamentals and Applications|last1=Bard|first1=Allen|last2=Faulkner|first2=Larry|publisher=J. Wiley and Sons|year=2000|isbn=978-0-471-04372-0}} Furthermore, B is readily extracted from rotating disk electrode experimental data.

The B can be defined as:{{Cite journal|last1=Wiberg|first1=Gustav K. H.|last2=Zana|first2=Alessandro|date=12 October 2016|title=Levich Analysis and the Apparent Potential Dependency of the Levich B Factor|journal=Analytical Letters|volume=49|issue=15|pages=2397–2404|doi=10.1080/00032719.2016.1149188|s2cid=100762397|issn=0003-2719}}

$B=\; (0.620)\; n\; F\; A\; D^\backslash frac\{2\}\{3\}v^\backslash frac\{-1\}\{6\}C$

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)