To prove the reproducibility of Ti/TiO2 electrode, hydrodynamic
amperometry experiments were repeatedly performed six
times as shown in Fig. 8 with this electrode in phosphate buffer
solution (pH 7.0). As it can be seen, Ti/TiO2 electrode has good
reproducibility. The stability of this electrode was also investigated.
After the electrode was stored for approximately for two
weeks only a small decrease of current sensitivity, about 6%, was
observed, which can be attributed to the good stability of Ti/TiO2
electrode