The voltammetric response obtained when the interface between two immiscibl
e electrolyte solutions (ITIES) is modified by commercially available, trac
k-etched membrane materials is reported. The electrochemical response is co
nsistent with the location of the ITIES within the pores of the membrane ma
terial, i.e. ensembles of micro-ITIES are generated by this procedure. The
mass-transport phenomena peculiar to these types of interface and prospects
for the measurement of interfacial kinetics are discussed.