Simultaneous, Selective and Highly Sensitive Voltammetric Determination of Lead, Cadmium, and Zinc via Modified Pencil Graphite Electrodes

Gul Sirin Ustabasi, Ismail Yilmaz, Mustafa Ozcan*, Ebru Cetinkaya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Pencil graphite electrode (PGE) modified with MWCNT and Bi3+ (MWCNT/Bi/PGE) was utilized in simultaneous analysis of Pb2+, Cd2+, and Zn2+. Surface and electrochemical characteristics of MWCNT/Bi/PGE were investigated via SEM, cyclic voltammetry, electrochemical impedance spectroscopy, and FTIR measurements. Even though modification with MWCNT did not improve the electroactive surface area, it significantly decreased the charge transfer resistance. Furthermore, modification with Bi3+ significantly increased the sensitivity. Finally, MWCNT/Bi/PGE exhibited the highest sensitivity and reproducibility compared to PGE and PGE modified with only MWCNT. MWCNT/Bi/PGE provided LOD values of 0.27, 0.43, and 1.63 μg L−1, and linear ranges of 1–80, 5–80, and 10–80 μg L−1 for Pb2+, Cd2+, and Zn2+, respectively. Proposed modification method offers effective electroanalytical performance with low time consumption and cost for the analyst.

Original languageEnglish
Pages (from-to)1237-1244
Number of pages8
JournalElectroanalysis
Volume34
Issue number8
DOIs
Publication statusPublished - Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Funding

This study is funded by The Scientific and Technological Research Council of Turkey (TUBITAK) and Mir Research and Development in the frame of 2244‐Industrial PhD Fellowship Program (Project no: 118C108). Authors would also like to thank H. Dilara Kilic and Seda Deveci for the support they provided during the project and Tekirdag Namik Kemal University Central Research Laboratory (NABILTEM) for the SEM images of the electrode surfaces. This study is funded by The Scientific and Technological Research Council of Turkey (TUBITAK) and Mir Research and Development in the frame of 2244-Industrial PhD Fellowship Program (Project no: 118C108). Authors would also like to thank H. Dilara Kilic and Seda Deveci for the support they provided during the project and Tekirdag Namik Kemal University Central Research Laboratory (NABILTEM) for the SEM images of the electrode surfaces.

FundersFunder number
NABILTEM
TUBITAK
Tekirdag Namik Kemal University Central Research Laboratory
Research and Development118C108
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu

    Keywords

    • Heavy metals
    • pencil graphite electrode
    • square wave anodic stripping voltammetry

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