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1.1. Electrode construction In potentiometry the measuring setup always consists of two electrodes: the measuring electrode, also known as the indicator electrode, and the reference electrode. Both electrodes are half-cells. When placed in a solution together they produce a certain potential. Depending on the construction of the half-cells, the potential produced is the sum of several individual potentials. Potential-determining transitions always occur at the phase boundaries, e.g. between the solution and the electrode surface.
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