Voltammetry in a gel medium

Voltammetry of ferricyanide in an agarose gel bulk medium allowed observati on of diffusion controlled redox currents. The diffusion coefficient of 0.2 8 x 10(-5) cm(2) /s was determined in the agarose gel medium. Furthermore, it was possible to scan the potential as slow as 0.01 mV/s without having c onvection currents. It provides a novel medium, not only to control diffusi on of redox species, but also to do electrochemistry without a container. ( C) 1999 The Electrochemical Society. S1099- 0062( 98) 09- 018- X. All right s reserved.