Electrode based on neutral carriers of the amine character and selective to the H+ ions: A simple quantitative description of the operation limits

The lower and higher assay limits of an electrode, selective to the H+ ions and based on neutral carriers of amine character, are described quantitati vely in the framework of the model of an ideally associated solution. The l imits are expressed as a function of the lipophilicity, the concentration o f ions of the supporting electrolyte, the amine basicity, and the ratio bet ween concentrations of the neutral carrier and the liquid ion-exchanger in the membrane. Simple quantitative relationships are obtained allowing one t o purposefully search for the composition of a membrane with required prope rties. The calculated operation limits are in good agreement with the exper imental data.