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Voltammetric determination of silver with a new multi-walled carbon nanotube modified paste electrode

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Abstract

This study introduces the sensitive determination of silver using modified carbon paste electrode based on multi-walled carbon nanotubes and a new synthesized chelating agent of N-(4-{4-[(anilinocarbothioyl)amino]benzyl}phenyl)-N-phenylthiourea. This electrochemical method is based on accumulation of silver ions at the surface of a new multi-walled carbon nanotube modified paste electrode. After preconcentration, the measurements were carried out in a closed circuit by electrolysis of the accumulated Ag(I) ions by voltammetric scanning from −0.2 to +0.2 V. Under the optimized conditions, a linear response range from 0.5 to 270 ng mL−1 was obtained. The detection limit and relative standard deviation for seven replicate measurements were 0.079 ng mL−1 and ±2.4%, respectively. The procedure was applied to determination of silver(I) in water, tea leaves and a certified reference material with satisfactory results.

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Authors and Affiliations

  1. Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran

    Somayye Cheraghi & Mohammad Ali Taher

  2. Young Researchers Society, Shahid Bahonar University of Kerman, Kerman, Iran

    Somayye Cheraghi

  3. Young Researchers and Elite Club, Kerman Branch, Islamic Azad University, Kerman, Iran

    Hamid Fazelirad

Authors
  1. Somayye Cheraghi
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  2. Mohammad Ali Taher
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  3. Hamid Fazelirad
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Corresponding author

Correspondence to Somayye Cheraghi.

Additional information

Published in Russian in Elektrokhimiya, 2015, Vol. 51, No. 3, pp. 317–324.

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Cheraghi, S., Taher, M.A. & Fazelirad, H. Voltammetric determination of silver with a new multi-walled carbon nanotube modified paste electrode. Russ J Electrochem 51, 271–277 (2015). https://doi.org/10.1134/S1023193514110032

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  • DOI: https://doi.org/10.1134/S1023193514110032

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