Preferred Label : membrane;
Detailed label : membrane in an ion-selective electrode;
IUPAC definition : A general term which refers to a continuous layer, usually consisting of a semi-permeable
material, with controlled permeability covering a structure, such as carbon or an
inert metal, or separating two electrolyte solutions. This latter case is the most
general form of an ion-selective electrode. The membrane separates the internal components
of the ion-selective electrode from the test solution. The membrane of an ion-selective
electrode is responsible for the EMF response and selectivity of the entire electrode.
Comment: Membranes of sensor electrodes are thought to be practically homogeneous,
but an actual membrane may contain inhomogeneous regions, often at surfaces, and connected
with materials and preparation methods used. Inhomogeneous regions include low dielectric
polymer regions with few charge sites and regions with high local site densities.
Surface regions of plasticized liquid membranes often are low in sites and high in
plasticizer or exuded impurities.;
Origin ID : M03823;
Automatic exact mappings (from CISMeF team)
See also
A general term which refers to a continuous layer, usually consisting of a semi-permeable
material, with controlled permeability covering a structure, such as carbon or an
inert metal, or separating two electrolyte solutions. This latter case is the most
general form of an ion-selective electrode. The membrane separates the internal components
of the ion-selective electrode from the test solution. The membrane of an ion-selective
electrode is responsible for the EMF response and selectivity of the entire electrode.
Comment: Membranes of sensor electrodes are thought to be practically homogeneous,
but an actual membrane may contain inhomogeneous regions, often at surfaces, and connected
with materials and preparation methods used. Inhomogeneous regions include low dielectric
polymer regions with few charge sites and regions with high local site densities.
Surface regions of plasticized liquid membranes often are low in sites and high in
plasticizer or exuded impurities.