Abstract
AbstractThe 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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