The main objective of the research was to deposit thin films of silver on a graphite carbon paste in a phosphate buffer medium using an electrochemical method. To construct a nitrofurazone detection sensor that is highly sensitive. Different manufacturing parameters, such as electrodeposition potential, pH effect, potential scan rate effect, and number of scan cycles, were examined in this section. The parameters were optimized to improve the deposited silver layers various electrocatalytic characteristics. The Nitrofurazone reduction process is diffusion controlled, as seen by the linear variation of Epc with log(v). The constructed Ag-NPs@CPE electrod has excellent electrical characteristics a large active surface area and low background with extremely high electrical conductivity, according to structural and electrochemical characterizations such as Scanning electron microscopy, X-ray diffraction (XRD) and cyclic voltammetry. The constructed sensor has a very remarkable analytical performance for nitrofurazone molecule identification, with a very low detection limit of about 10– 8 M. The detection of nitrofurazone using our Ag-NPs@CPE sensors in real samples contaminated with the antibiotic nitrofurazone, such as tap water and urine. In the selected sample, the electroanalytical findings reveal a very satisfactory recovery rate of more than 94 percent.

    Abstract
    1 Introduction
    2 Experimental section
        2.1 Chemicals and reagents
        2.2 Apparatus
        2.3 Process for modifying CPE
        2.4 Electrochemical measurement
        2.5 Analytical procedure
    3 Results and discussion
        3.1 Electrochemical behavior of the Nitrofurazone
        3.2 Electrodeposition of Ag on Carbon Graphite
        3.3 Optimization of Ag film deposition parameters on carbon graphite
        3.4 Characterization by X-ray diffraction
        3.5 Scanning electron microscopy characterization of Ag-NPs@CPE
        3.6 Characterization by cyclic voltammetry
    4 Application to the electrochemical detection of Nitrofurazone
        4.1 Effect of scan rate
        4.2 Effect of pH
        4.3 Calibration curve
        4.4 Effect of interferents
        4.5 Repeatability and reproducibility of Ag-NPs@CPE
    5 Analytical application
    6 Conclusions
    Acknowledgements 
    References

• J. Zoubir(Team of Catalysis and Environment Ibn Zohr University Faculty of Sciences)
• A. Assabbane(Team of Catalysis and Environment Ibn Zohr University Faculty of Sciences)
• I. Bakas(Team of Catalysis and Environment Ibn Zohr University Faculty of Sciences)