A hydrodynamic electrochemical method based on a rocking disc system with 90 amplitude and a frequency range of 0.83-16.7 Hz is reported. The system is versatile and similar in characteristics to the familiar rotating disc voltammetry method (e.g. providing a uniform diffusion layer but without sliding contacts), except for the more complex flow pattern imposed by the oscillatory movement. A Levich-type mass transport limited current response linear with the square root of rocking frequency is obtained. Additionally, a dual-semi-disc generator-collector system is demonstrated and characterised for the one-electron quasi-reversible Fe(CN)(6)(3-/4-) redox couple. Generator-collector current efficiencies vary from 3% to 6% and characteristic transient concentration modulation effects are observed suitable for Fourier transform analysis. Rotational asymmetry in the flow pattern is detected. (C) 2014 Elsevier BM. All rights reserved.