In the potential range of +0.2 to -0.3 V the 𝑉𝐴 𝑛 𝐶 at 261 nm exhibits some reversible changes related to the redox peaks centred at -0.10 V. These changes were already discussed for parallel configuration (Figure ), concluding that this redox process involves some species present in solution. However, the corrected absorbance in normal configuration (𝑉𝐴 𝑛 𝐶 ) only provides information about processes taking place on the surface of the WE, suggesting that these voltametric peaks also involve the participation of species chemisorbed on the electrode surface.