Also contains definitions of: heterogeneous membrane electrode, homogeneous membrane electrode
https://doi.org/10.1351/goldbook.C01431
Electrodes which contain mobile ions of one sign and fixed sites of opposite sign. They may be homogeneous or heterogeneous.
- Homogeneous membraneelectrodes are ion-selective electrodes in which themembraneis a crystalline material prepared from either a single compound or a homogeneous mixture of compounds (i.e. Ag2S, AgI / Ag2S).
- Heterogeneous membraneelectrodes are formed when an active substance, or mixture of active substances, is mixed with aninertmatrix, such as silicone rubber or PVC, or placed on hydrophobizedgraphiteor conducting epoxy, to form the heterogeneous sensingmembrane.