摘要 |
A measurement electrode system comprises a working electrode, an auxiliary electrode and, instead of a conventional reference half-cell, a solid electrode, such as a 2nd species electrode, the potential of which is stabilized by a constant ionic concentration of a solution introduced in the liquid to be tested. Combinations suitable for such a solid electrode are, for example, of the metal/metal oxide type such as Ir/IrO2. The invention overcomes the disadvantages associated with reference half-cells. The electrodes are connected in a polestrostat circuit, and may be incorporated in a single, solid supporting member. <IMAGE> |