Fabrication and electrochemical study of [Ru(NH3)6]³⁺/Nafion modified electrodes for the determination of trace amounts of Pb²⁺, Cd²⁺, and Zn²⁺ via anodic stripping voltammetry

• Main Authors: Palisoc, Shirley T., Natividad, Michelle T., Martinez, Nicole Mae D. C., Ramos, Rochelle Marie A., Kaw, Kevin Anthony Y.
• Format: text
• Published: Animo Repository 2016
• Subjects: Heavy metals; Lead; Cadmium; Zinc Anodic stripping voltammetry; Physics
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/1749; https://animorepository.dlsu.edu.ph/context/faculty_research/article/2748/type/native/viewcontent
• Institution: De La Salle University

[Ru(NH3)6]3+/Nafion modified indium tin oxide (ITO) electrodes were fabricated via the drop coating technique and were used for the simultaneous determination of lead (Pb2+), cadmium (Cd2+), and zinc (Zn2+) in trace amounts using anodic stripping voltammetry (ASV). The amount of [Ru(NH3)6]3+ in the coating solution was varied at 5 mg, 10 mg, and 15 mg. The fabricated electrodes were used to detect varying concentrations of Pb, Cd and Zn. ASV results showed that as the amount of [Ru(NH3)6]3+ was increased, the reduction current of the heavy metals increased as well. The Pearson correlation values obtained for Pb and Cd were close to 1.0, indicating a strong positive linear relationship between the variables. The minimum heavy metal concentration that can be simultaneously detected by the fabricated electrodes is 0.5 ppm. © 2016 by De Gruyter.