diffusion current constant

in polarography
https://doi.org/10.1351/goldbook.D01723
The empirical quantity defined by i=id,lcB m23 t116 the equation where id,l =
limiting diffusion current
, cB = bulk concentration of the substance B whose
reduction
or
oxidation
is responsible for the wave in question, m = average rate of (mass) flow of mercury (or other liquid metal) and t1 = drop time.
Source:
PAC, 1985, 57, 1491. (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1500 [Terms] [Paper]