The current density

of a species
B in a given point of the solution is obtained by multiplying the flux density of that
species at the given point by the
Faraday constant

and by the
charge number

of the species:
where

is a vector
which indicates the direction in which the charges transported by the species
B flow and which
gives the number of these charges going through a plane oriented perpendicular to the vector, divided by time
and by area, and

is the flux density of a minor
constituent of the solution with
respect to a fixed frame of reference.
Source:
PAC, 1981, 53, 1827
(Nomenclature for transport phenomena in electrolytic systems) on page 1833
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.