Voltammetric determination of copper and zinc in water using a Ruthenium bipyridyl/Nafion-modified indium tin oxide-coated glass electrode

  • Shirley Tiong Palisoc Condensed Matter Research Unit, Center for Natural Science and Environmental Research, College of Science, De La Salle University, 2401 Taft Avenue, Manila 0922, Philippines
  • Michelle Tiamzon Natividad De La Salle University
  • Craig Egan Allistair Dumanon Tan Condensed Matter Laboratory, Physics Department, De La Salle University, 2401 Taft Ave., Manila, Philippines

Abstract

Chemically-modified Indium Tin Oxide (ITO) coated glass substrates were fabricated by depositing Nafion thin films doped with tris (2,2’-bipyridyl) ruthenium(II) dichloride hexahydrate via drop coating deposition technique. The Nafion volume concentration in the film is 1% (v/v) and the mediator concentration is 5 mg per 1 mL Nafion. The chemically-modified electrodes were characterized by cyclic voltammetry (CV) and were used as working electrodes to detect varying concentrations of copper (Cu2+) and zinc (Zn2+) in a 0.1 M NaCl supporting electrolyte solution via Anodic Stripping Voltammetry (ASV). Cu2+ and Zn2+ ions were successfully determined by ASV. The limits of detection for Cu2+ and Zn2+ were 0.1 ppm and 0.7 ppm, respectively. The modified electrodes were used to determine the presence of Cu2+ and Zn2+ in different real water samples. The presence of Cu2+ was successfully determined in deep well, lake, and tap water samples, while the presence of Zn2+ was successfully determined in sea and tap water samples. Atomic Absorption Spectroscopy (AAS) results confirm the presence of Cu2+ and Zn2+ in the samples.

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Published
2017-06-29
How to Cite
PALISOC, Shirley Tiong; NATIVIDAD, Michelle Tiamzon; TAN, Craig Egan Allistair Dumanon. Voltammetric determination of copper and zinc in water using a Ruthenium bipyridyl/Nafion-modified indium tin oxide-coated glass electrode. Journal of New Materials for Electrochemical Systems, [S.l.], v. 20, n. 3, p. 089-093, june 2017. ISSN 2292-1168. Available at: <http://new-mat.org/ejournal/index.php/jnmes/article/view/261>. Date accessed: 20 sep. 2017. doi: https://doi.org/10.14447/jnmes.v20i3.261.
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