Fig. 2.

Graphite felt electrodes display higher signal intensities compared to glassy carbon. The effect of the electrode composition was determined by measuring the response of the graphite felt (dark gray bars) and glassy carbon (light gray bars) to various concentrations of Ab-HRP. The absolute value of the current (y-axis on the left measured) at −340 mV for both the graphite felt and GCEs is reported in addition to the optical density reading (red line) of the Ab-HRP dilutions (y-axis on the right). Measurements represent the average values of three independent experiments with error bars indicating the standard error of the mean