https://doi.org/10.1351/goldbook.R05229
- An external electrode system which comprises an inner element, usually mercury–mercury(I) chloride (calomel), silver–silver chloride or thallium amalgam–thallium(I) chloride, a chamber containing the appropriate filling solution and a device for forming a @L03584@, e.g. capillary, @CT07540@ plug, fritted disc or ground glass sleeve.
- An electrode that maintains a virtually invariant potential under the conditions prevailing in an electrochemical measurement, and that serves to permit the observation, measurement, or control of the potential of the indicator (or test) or @W06686@.