Related Experiment Video
Updated: Jun 27, 2026

Electrochemical Preparation of Poly(3,4-Ethylenedioxythiophene) Layers on Gold Microelectrodes for Uric Acid-Sensing Applications
Published on: July 28, 2021
Stripping voltammetry of silver ions at polythiophene-modified platinum electrodes
H Zejli1, J L Hidalgo-Hidalgo de Cisneros, I Naranjo-Rodriguez
1Equipe de Recherche Bioelectrochemie et Systèmes Interfaciaux, University Abdelmalek Essaadi, Morocco; Medical Bioinorganic Chemistry Laboratory, University Paul Sabatier, France.
Abstract:
The present work describes the development of a modified platinum electrode for stripping voltammetric determination of silver. The deposition of films based on electropolymerisation of the monomer thiophene was carried out by cycling the potential towards positive values between 0 and 1.6V. The preconcentration process of silver ions was initiated on the surface of the modified electrode by complexing silver with polythiophene (PTH) when a negative potential (-0.5V) was applied; then the reduced products was oxidized by means of differential pulse stripping voltammetry and the peak was observed at 0.17V. Parameters such as pH, supporting electrolyte and number of electropolymerisation cycles were studied. A linear relation between current peak and concentration of Ag(I) was obtained in the range 0.07-1.0mgL(-1). The detection limit for Ag(I) was evaluated to be 0.06mgL(-1). The reproducibility was tested carrying out 11 measurements at different electrodes and the relative standard deviation was 1.5%. The interference of several metals was investigated and showed negligible effect on the electrode response.
Related Concept Videos
Voltammetry: Stripping Methods
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Voltammetric Techniques: Linear-Scan (E vs Time)
Electrodeposition
Electrodeposition can...
Voltammetry: Overview
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
Voltammetric Techniques: Cyclic Voltammetry
Electrogravimetric Analysis: Overview
To test the completeness of the...

