shown theoretically and confirmed experimentally, in a solution stirred cha
otically with a stirrer, spectral density of turbulent fluctuations of the
limiting diffusion current is a 1/f(3) noise at frequencies exceeding that
of relaxation of the stationary diffusion layer. Normalized to its own valu
e at the minimum frequency, the spectral density possesses self-similarity
and is directly proportional to the rate of steady turbulent mass transfer
to the sixth power and inversely proportional to the product of the molecul
ar diffusion coefficient of the electroactive substance, D, and the frequen
cy of the spectral analysis to the third power. A relationship is derived f
or estimating:D without recourse to the kinetic viscosity of solution.