Preparation Of Ion-selective Electrode Research Articles

Preparation of Ion Selective Electrode Based on Ionophore and Used to Monitor the Lead (II) Ion

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Circumventing Traditional Conditioning Protocols in Polymer Membrane-Based Ion-Selective Electrodes.

Preparation of ion-selective electrodes (ISEs) often requires long and complicated conditioning protocols limiting their application as tools for in-field measurements. Herein, we eliminated the need for electrode conditioning by loading the membrane cocktail directly with primary ion solution. This proof of concept experiment was performed with iodide, silver, and sodium selective electrodes. The proposed methodology significantly shortened the preparation time of ISEs, yielding functional electrodes with submicromolar detection limits. Moreover, it is anticipated that this approach may form the basis for the development of miniaturized all-solid-state ion-selective electrodes for in situ measurements.

CHEMICAL SENSOR BASED ON SILVER/SILVER SULFIDE MICROELECTRODE

A simple method was used for the preparation of ionselective electrodes for silver and sulfide ions with micrometric and small dimensions. The electrode was fabricated by etching a silver wire to a fine point and then coating with an electrophoretically deposited paint, which is subsequently heat-cured to isulate all but the very end of the tip. The constructed electrode exhibits a potentiometric response to silver and sulfide ions with Nernstian slopes. The sensor has a linear response in the concentration ranges from 1 × 10−6 to 1 × 10−1 and from 1 × 10−7 to × 10−1 M for silver and sulfide ions, respectively. The microelectrode could be used as the indicator electrode for measuring both Ag| and S2 by analytical titration. The introduced microelectrode is simple and has long-term stability.