Synthesis of AgVO3@ carboxylated CNTs nanocomposite-modified electrode and application to electrochemical determination of nitrite in food samples

This study created a nanocomposite of AgVO 3 and a modified glassy carbon electrode (β-AgVO 3 @c-CNTs/GCE) and looked into how it might be used to measure nitrite in food samples electrochemically. The AgVO 3 @CNTs nanocomposite was made using a hydrothermal process. Structural studies using X-ray diffraction, X-ray photoelectron spectroscopy and field emission scanning electron microscopy analyses validated the efficient production of the AgVO 3 @c-CNTs nanocomposite. Electrochemical studies using cyclic voltammetry (CV) and amperometry analyses revealed that the surface of β-AgVO 3 @c-CNTs/GCE exhibited the highest electrocatalytic activity for the oxidation of NO 2 ˉ. This surface had a low detection limit of 5.4 nM, a linear range from 5 to 4120 µM, and a sensitivity of 0.27222 µA/µM. To test the method’s effectiveness, recovery tests were done on actual samples that were made from sausage samples. The results showed that the recommended technique for nitrite detection in food samples was accurate and practical, with relative standard deviation values ranging from 3.30 to 4.18% and recovery rates from 94.50 to 99.00%.