ELECTROCHEMICAL CHARACTERIZATION OF BORON-DOPED POLYCRYSTALLINE DIAMOND THIN-FILM ELECTRODES

The electrochemical characterization of boron-doped polycrystalline di amond thin-film (BDF) electrodes was studied using the anodic scan aft er concentrating lead in 0.1 mol/L KCl-4l mu mol/L Hg(NO3)(2) and 0.1 mol/L KNO3 - 0.01 mol/L HNO3 - 41 mu mol/L Hg(NO3)(2); accumulation vo ltage was - 0.90 V. The results obtained were compared with those give n by glassy carbon (GC) electrodes and proved that the BDF electrodes offered high sensitivity, good precision and extreme stability over a 2-month period. These electrodes provided good resolving power for the determination of lead and cadmium and gave satisfactory results in th e analysis of a pure water sample.