This paper deals with global and local wall-to-liquid mass transfer under divergent laminar radial flow conditions between two parallel stationary discs. Approximate theoretical expressions for local and overall transport rates in piston flow and Poiseuille flow, and empirical correlations from the literature, are compared to experimental observations utilizing the electrochemical method of rate measurement. The experimental results support the theoretical approach for this laminar flow regime, the latter expanding the scope of the applicability of electrochemical methods presented in the literature.