The corrected absorbance in normal configuration at a given wavelength 𝐴 𝑛 𝐶 , provides information about the processes taking place on the electrode surface, with minimal contribution from processes taking place in the solution. Therefore, when studying the absorbance of a species formed in solution, the value of 𝐴 𝑛 𝐶 should be close to zero. If the value of 𝐴 𝑛 𝐶 changes significantly during the experiment, this variation must be related to processes taking place on the WE surface, since only the normal configuration interrogates the electrode surface.