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Square wave anodic stripping voltammetry of copper(II) at a MWCNT paste electrode modified with a tetracarbonylmolybdenum(0) nanocomposite

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Abstract

The article reports on a MWCNT paste electrode modified with the fenchone diazine tetracarbonylmolybdenum(0) complex, and on its application to sensitive determination of Cu(II) by using square wave anodic stripping voltammetry. Under optimal conditions and at a typical working voltage of 33 mV (vs. Ag/AgCl), response is linearly related to the concentration of Cu(II) in the 0.1 nM to 1.0 μM range, and the limit of detection is 80 pM. The relative standard deviation [for n = 5 and at a 1.0 μM concentration of Cu(II)] is 3.6 %. Unlike Pb(II), the ions Ni(II), Mg(II), Cd(II), Co(II), Hg(II), and Zn(II) do not strongly interfere. Electrochemical impedance spectroscopy reveals a fast charge transfer at the electrode-solution interface. The method was applied to the analysis of Cu(II) in water samples, and the results agreed well with those obtained by ICP-OES.

The graph shows (a) a schematic of the tetracarbonylmolybdenum-modified multiwalled carbon nanotube paste electrode applied to the determination of Cu(II); (b) the formation of Cu(II)tetracarbonylmolybdenum on the electrode surface; (c) the reduction of Cu(II) to form Cu(0), and (d) the square wave anodic stripping voltammetric oxidation of Cu(0) back into solution as Cu(II)

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Acknowledgments

The authors would like to thank Ministry of Education Malaysia and Universiti Pendidikan Sultan Idris for providing the respective financial support Grant nos.: FRGS 2013-0056-101-02 and ERGS2013-0082-102-22 for this work.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900, Tanjong Malim, Perak, Malaysia

    Mohamad Idris Saidin, Illyas Md Isa, Mustaffa Ahmad, Norhayati Hashim & Azlan Kamari

  2. Nanotechnology Research Centre, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900, Tanjong Malim, Perak, Malaysia

    Illyas Md Isa, Norhayati Hashim & Azlan Kamari

  3. Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, 11900, USM Pulau, Pinang, Malaysia

    S. Ab Ghani

  4. Deparment of Chemistry Education, Faculty of Mathematics and Natural Science, Yogyakarta State University, Yogyakarta, Indonesia

    Suyanta M. Si

Authors
  1. Mohamad Idris Saidin
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  2. Illyas Md Isa
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  3. Mustaffa Ahmad
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  4. Norhayati Hashim
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  5. Azlan Kamari
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  6. S. Ab Ghani
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  7. Suyanta M. Si
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Correspondence to Illyas Md Isa.

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Saidin, M.I., Md Isa, I., Ahmad, M. et al. Square wave anodic stripping voltammetry of copper(II) at a MWCNT paste electrode modified with a tetracarbonylmolybdenum(0) nanocomposite. Microchim Acta 183, 1441–1448 (2016). https://doi.org/10.1007/s00604-016-1771-1

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  • DOI: https://doi.org/10.1007/s00604-016-1771-1

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