College
College of Science
Department/Unit
Physics
Document Type
Article
Source Title
International Journal of Electrochemical Science
Volume
13
Issue
9
First Page
8854
Last Page
8866
Publication Date
9-1-2018
Abstract
Silver nanoparticle (AgNP) graphene paste electrodes were fabricated from graphene powder mixed with mineral oil and silver nanoparticles. Anodic stripping voltammetry (ASV) was utilized to simultaneously detect lead (Pb2+), cadmium (Cd2+) and copper (Cu2+). The optimized amounts of mineral oil and AgNP were 80μL and 2mg respectively. The calibration curve of the optimized electrode showed a strong line correlation between the heavy metal concentration and the reduction current for Pb2+, Cd2+, and Cu2+. In addition, the limit of detection is 17 parts per billion (ppb) for Cd2+, 12 ppb for Pb2+ and 44 ppb for Cu2+. The optimized electrode was tested on three commercial brands of Puerh tea. Copper metal ions, Cu2+, were found in the tea samples. Lastly, atomic absorption spectroscopy was used to verify the results obtained from ASV. © 2018 The Authors.
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Digitial Object Identifier (DOI)
10.20964/2018.09.03
Recommended Citation
Palisoc, S. T., Lee, E. T., Natividad, M. T., & Racines, L. R. (2018). Silver nanoparticle modified graphene paste electrode for the electrochemical detection of lead, cadmium and copper. International Journal of Electrochemical Science, 13 (9), 8854-8866. https://doi.org/10.20964/2018.09.03
Disciplines
Physics
Keywords
Graphene; Nanoparticles; Electrodes; Anodic stripping voltammetry
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