For purposes of convolutive modelling, a need exists for polynomial functions relating to inlaid disc electrodes operating under diffusion-controlled conditions. To satisfy this need, the method pioneered by Cope and Tallman has been reimplemented. Data from that exercise, and from other sources, have been used to construct useful short- and long-time polynomial functions that together span the entire time range. To the extent possible, these functions have been compared with literature data and tested for internal consistency. (C) 2004 Elsevier Ltd. All rights reserved.