Carbon Nanotubes Paste Versus Graphite Working Electrodes in Electrochemical Analysis

In this paper, the possibility of replacement of mercury drop electrode in heavy metals electrochemical analysis by thick-film sensor with solid electrodes has been presented. Eight types of different pastes containing carbon nanotubes powder and two new types of graphite based pastes have been prepared, deposited and measured using differential pulse voltammetry as a material of the working electrode of the standard thick-film sensor. All the results were plotted out into the plot of calibration curves and compared with measurements of the sensors with different type of graphite working electrodes, classical commercial graphite electrode SESV11 and sensor with gold working electrode.