5. Ultramicroelectrodes
The term ultramicroelectrodes (UME) refers to electrodes whose surface area is considerably smaller than that of standard indicator electrodes: in the order of μm2 instead of mm2.
Note:The emergence of very small electrodes poses a vocabulary problem. It is customary to refer to electrodes commonly used in voltammetry, which are approximately 1 mm in size, as microelectrodes. The term ultramicroelectrodes has therefore been adopted to refer to the electrodes described here, which are micrometric in size.
Reducing the size of the electrode has, in principle, a disadvantage due to the decrease in the intensity of the current to be measured (proportional to the area). of the electrode). However,...
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Ultramicroelectrodes