How does uncompensated resistance affect a cyclic voltammogram?
If the uncompensated resistance is significant (hundreds of ohms), then the peak potential separation increases and the peak current decreases. These effects become more pronounced with increasing scan rate. Unfortunately, these effects are also characteristic of slow electron transfer kinetics. Since slow electron transfer kinetics are not dependent on analyte concentration, and the effects of uncompensated resistance are (E = iR), the two can be differentiated by running the experiments at different analyte concentrations.
