This paper provides reference values of the diffusion-limited current at a disk electrode as a response to a potential jump, over the time region for which there have been no satisfactory analytical solutions. The current values are better than 0.1% accurate and are spaced in a temporal sequence over the critical time range such that simple interpolation can yield the current at any point in between, with the same accuracy. This provides a standard of comparison for other simulation programs and experimental data. (C) 2004 Elsevier Ltd. All rights reserved.