Dual Sensitivity─Potentiometric and Fluorimetric─Ion-Selective Membranes.

ABSTRACT: Classical application of ion-selective membranes is limited to either electrochemical or optical experiments. Herein, the proposed ion-selective membrane system can be used in both modes; each of them offering competitive analytical parameters: high selectivity and linear dependence of the signal on logarithm of analyte concentration, high potential stability in potentiometric mode, or applicability for alkaline solutions in optical mode. Incorporation of analyte ions into the membrane results in potentiometric signals, as in a classical system. However, due to the presence of lipophilic positively charged ions, polymer backbones, full saturation of the membrane is prevented even for long contact time with solution. The presence of both positively charged and neutral forms of conducting po

SUBMITTER: Stelmach E 

PROVIDER: S-EPMC8581967 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature