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Lowering the detection limit of calcium selective ISFETs with polymeric membranes
Andrey Bratov1, Natalia Abramova, Carlos Domı Nguez
1Centro Nacional de Microelectrónica, Grupo Transductores Quimicos, Campus U.A.B., Bellaterra E08193 Barcelona, Spain.
Abstract:
Detection limits of Ca sensitive ISFETs with photocured polyurethane membranes with a neutral carrier and an ion-exchanger as ionophores are studied. It is shown that conditioning of ISFETs in solutions containing only interfering ions results in reduction of the detection limit. Zero-current ion fluxes approach elaborated for polymeric membrane ion-selective electrodes (ISEs) is used to explain the obtained results.

