The SPOT potentiostat allows the measurement of the current flow that results from the reduction or oxidation of the test compounds present in solution, caused by a controlled variation in the potential difference between two particular electrodes.
The basic units of a voltage analyser are:
A cell based on a system comprising three electrodes immersed in the solution to be analysed.
The three electrodes are:
- The work electrode,
- The reference electrode,
- The auxiliary electrode.
An electronic circuit (called potentiostat) that allows the potential to be modified and the current to be recorded.
By plotting the curve I = f(V), one determines the concentration of the specied to be measured.
The SPOT potentiostat must be associated with a sensor that requires a waterproof voltage measurement (e.g. sulfur sensor).