Luggin capillary functionality

The functionality of the Luggin capillary in reducing the ohmic drop contribution to the electrode potential depends also on the choice of the experimental technique. The use of four wires permits the elimination of any type of resistance outside the electrolytic ceU. The use of three wires, on the other hjind, is satisfactory only if the resistances outside the cell can be neglected, regardless of the intensity of the current flowing in the system. Moreover, a Luggin capillary should not be used when its presence may perturb the hydrodynamic conditions of the electrolytic solution. 

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