Solid State Electrode

 Solid State Electrode

This electrode is fixed with ionic conducting membranes which is made up of ionic compound or a mixture of ionic compound.

 They allow only selective ions to pass them The ion which can change themselves into crystal structures can interfere with this electrode response. This is the main difference between glass membrane electrodes and solid-state electrodes.

 The lack of an internal solution reduces the potential junction. Selectivity of crystalline membrane both ions such as anion and cation in membrane forming substance.

Example

“Homogeneous and finely divide crystalline material like LaF₃for determination of F^- ion in water.”

The membrane is made by doping europium Fluoride EuF₂ with Lanthum trifluoride LaF₃. The crystal is sealed at the bottom of the polymeric container in the reference solution. EuF₂ produces the hole in the crystal lattice of LaF₃ through which F^- ion can pass.

When an electrode is in contact with an electrolyte solution a potential develops across the membrane. As internal concentration is filled potential development is related to the concentration of the sample solution.