Electrochemical determination of sulfaguanidine using COOH-MWCNT coated GC electrode |
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Authors: | Ben Jabrallah Taha Chaabani Amal Belhadj Tahar Noureddine |
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Affiliation: | Analyses et Procédés Appliqués à l'Environnement UR 17ES32, Institut Supérieur des Sciences Appliquées et de Technologie de Mahdia, Université de Monastir, Route Rejiche 5121, Mahdia, Tunisie |
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Abstract: | The electrochemical behavior of sulfaguanidine was investigated in PBS buffer aqueous solutions. Cyclic voltammograms have shown that (1) the Sg provided a well-defined irreversible oxidation peak (2) the signal-to-background current ratio is 3 times higher at COOH-MWCNT coated GCE than that of bare GCE and (3) the modifying GCE surface by COOH-MWCNT led to a significant improvement (2.7 folds) of the electrochemical response. It has been shown that Sg oxidizes according to a diffusion-controlled mechanism. A linear calibration curve was obtained for the oxidation of Sg at 10–70 μM. The COOH-MWCNT coated GCE has also been successfully used for the determination of Sg in real samples. |
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Keywords: | anodic oxidation COOH functionalized multi-walled carbon nanotube cyclic and square wave voltammetry and electrochemical impedance spectroscopy sulfaguanidine |
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