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Amprometric detection of Glycine, l-Serine, and l-Alanine using glassy carbon electrode modified by NiO nanoparticles

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Abstract

Glassy carbon electrode modified with nickel oxide nanoparticles has been used to investigate the electrochemical oxidation of Glycine, l-Serine, and l-Alanine in an alkaloid solution. The electrochemical behavior of the modified electrode was characterized by cyclic voltammetry in detail. The electrocatalytic behavior is further exploited as a sensitive detection scheme for the above amino acids by hydrodynamic amperometry. Under optimized conditions, the calibration curves are linear in the concentration ranges of 1–200 μM for Glycine, 1–400 μM for l-Serine, and 30–200 μM for l-Alanine, respectively. The respective detection limit (S/N = 3) and sensitivity are 0.9 μM and 24.3 nA μM−1 for Glycine, 0.85 μM and 12.4 nA μM−1 for l-Serine, and 29.67 μM and 0.4 nA μM−1 for l-Alanine. The prepared electrode exhibits a satisfactory stability and long life-time, while it is stored at ambient conditions.

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Acknowledgments

This work was financially supported by the Iranian Nanotechnology Initiative and the Research Office of the University of Kermanshah.

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Authors and Affiliations

  1. Department of Chemistry, Ilam University, Ilam, Iran

    Mahmoud Roushani

  2. Department of Chemistry, Razi University, Kermanshah, Iran

    Mojtaba Shamsipur

  3. Faculty of Material and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran

    Seied Mahdi Pourmortazavi

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  1. Mahmoud Roushani
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  2. Mojtaba Shamsipur
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  3. Seied Mahdi Pourmortazavi
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Correspondence to Mahmoud Roushani.

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Roushani, M., Shamsipur, M. & Pourmortazavi, S.M. Amprometric detection of Glycine, l-Serine, and l-Alanine using glassy carbon electrode modified by NiO nanoparticles. J Appl Electrochem 42, 1005–1011 (2012). https://doi.org/10.1007/s10800-012-0475-4

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