Electro-analytical characterization of carbon paste electrode for detection of heavy metal ion

Carbon paste electrodes (CPE) as an electrochemical sensor has been fabricated using graphite powder and paraffin oil. The basic electrochemical parameters of the CPE electrode are characterized by cyclic voltammetry and electrochemical impedance spectroscopy (EIS). Potassium ferricyanide K3[Fe(CN)6...

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Bibliographic Details
Published in:Indian journal of chemical technology 2019-11, Vol.26 (6), p.562
Main Authors: Mourya, Arti, Mazumdar, Bidyut, Sinha, Sudip Kumar
Format: Article
Language:English
Subjects:
Carbon
Charge transfer
Chemical sensors
Detection limits
Diffusion coefficient
Electrochemical impedance spectroscopy
Electrochemistry
Electrodes
Electron transfer
Heavy metals
Mathematical analysis
Metal ions
Paraffin
Paraffins
Potassium
Potassium ferricyanide
Redox reactions
Spectroscopy
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Summary:Carbon paste electrodes (CPE) as an electrochemical sensor has been fabricated using graphite powder and paraffin oil. The basic electrochemical parameters of the CPE electrode are characterized by cyclic voltammetry and electrochemical impedance spectroscopy (EIS). Potassium ferricyanide K3[Fe(CN)6] solutions as benchmark media to check redox reactions. Results illustrated that electron transfer to the electrode surface was diffusion controlled by both the techniques. The detection limits are 8×10-5 M for K3Fe(CN)6 and 0.019 M for lead ion. The diffusion coefficient (D), no. of electron transfer, and charge transfer coefficient were also investigated.
ISSN:0971-457X
0975-0991