Determination of Lead (Pb2+) by Anodic Stripping Voltammetry Based on [Ru(NH3)6]3+/Nafion Modified Electrodes

Determination of Lead (Pb2+) by Anodic Stripping Voltammetry Based on [Ru(NH3)6]3+/Nafion Modified Electrodes

Shirley Tiong Palisoc* Michelle Tiamzon Natividad, Patricia Denise DeVera Benjamin Simone B. Tuason

Materials Science Laboratory, Physics Department, De La Salle University, 2401 Taft Ave., Manila, Philippines

Corresponding Author Email:,,,
10 October 2014
31 October 2014
26 November 2014
| Citation

Chemically modified [Ru(NH3)6]3+ doped Nafion® thin film was fabricated on indium tin oxide (ITO) coated glass electrodes by using the drop-coating method to detect heavy metal ions of Pb(II) in de-ionized water analyte solution via anodic stripping voltammetry (ASV). This study also determined the effect of varying the concentration of the mediator ([Ru(NH3)6]3+) on the detection of the said heavy metals. The redox mediator Ru(NH3)6]3+ used in the study was effectively incorporated and immobilized within the Nafion modified electrodes. Lead concentration in the electrolyte solution and the concentration of the redox mediator was varied to control the properties of the fabricated electrodes which utilized for heavy metal detection through ASV. The conducting properties of ITO electrodes were enhanced with the deposition of Nafion® attaining minimal interference. The stripping current peaks increased with the concentration of the heavy metal present in the solution as well as with the mediator concentration.


Nafion, Drop Coating, Anodic Stripping Voltammetry, Heavy Metal, Electrochemistry

1. Introduction
2. Materials and Methodology
3. Results and Discussion
4. Conclusion
5. Acknowledgement

The authors wish to give acknowledgement to De La Salle University for providing financial and administrative support.


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