Ionomer Film-Coated Electrodes as Electrochemical Sensors

Publisher Website
Google Scholar
Abstract
Recent studies have shown that perfluorosulfonate ionomer film-coated electrodes have potential applications as electrochemical sensors. This paper reports on fundamental investigations of the response characteristics of electrochemical sensors prepared by coating glassy carbon electrode surfaces with films of the perfluorosulfonate ionomer Nafion. The effects of various experimental parameters on sensitivity, detection limit and linear response range of the Nafion-coated electrodes were studied. The experimental parameters investigated included film thickness, duration of exposure of the film to the analyte solution, and electrochemical detection method. These studies have shown that Nafion-modified electrodes can be extremely sensitive electrochemical sensors. Differential pulse detection at the Nafion-film coated electrode provided the lowest detection limit (10−9 M). Methods of purging the analyte cation from the Nafion film were also studied.

This publication has 26 references indexed in Scilit: