The novel use of micro ITIES to study electron transfer (ET) has been investigated. Micropipettes and microholes were used to support the interface and the organic solvents considered were 1,2-DCE and o-NPOE. ET involving ferrocene, dimethylferrocene and tetracyanoquinodimethane as the organic redox couples was studied. The ferri/ferrocyanide redox couple was used in all cases as the aqueous redox couple. Micro ITIES were found not to be amenable to kinetic determination. ET is complicated by reactions involving the base electrolytes used, partitioning of redox products, equilibrium reactions and interfacial precipitation, which will need to be considered if accurate kinetic data is to be realised. (C) 1998 Elsevier Science Ltd. All rights reserved.