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A ZrNPs/Fe.sub.3O.sub.4/GO nanocomposite was successfully synthesized for the first time with an in-situ method, and its properties were defined by energy-dispersive X-ray spectroscopy, scanning electron microscopy, and powder-XRD techniques. Synthesized nanocomposite was then used as a modifier to prepare modified glassy carbon electrodes for the determination of nitrite ions in foodstuffs. Differential pulse voltammetry and cyclic voltammetry studies showed a high catalytic activity of the proposed nanocomposite in nitrite oxidation. In addition, the electrode showed a linear response between 3 and 76 [mu]M, a detection limit of 3 [mu]M, and high selectivity. The synthesized nanocomposite was stable for at least 9 months, and the resultant electrode had similar stability., Author(s): Arezou Akbari [sup.1] , Parvin Dehghan [sup.2] , Baharak Divband [sup.3] [sup.4] , Esmaeel Alipour [sup.5] , Amir Hossein Moradi [sup.1] Author Affiliations: (1) https://ror.org/04krpx645, grid.412888.f, 0000 0001 2174 [...]

Palladium/zinc oxide loaded on graphene oxide (PZGO) nanocomposites were successfully synthesised in-situ for the first time, and its properties were characterised by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and powder-XRD techniques. The prepared nanocomposite was used to modify the glassy carbon electrode (GCE) surface for the determination of nitrite ions (NO2−) in foodstuffs. The synergetic effect of different layers was then investigated using PZGO nanocomposites and graphene oxide nanoparticles (GO) to modify the GCE surface. Voltammetric analysis showed that the nanocomposite has a desirable catalytic activity towards nitrite oxidation. The proposed sensor can selectively detect nitrite ions within a linear range from 3.17 μM to 1111 μM with a detection limit of 2.39 μM. The synthesised nanocomposites were stable for at least 9 months and the developed sensor had long stability. [ABSTRACT FROM AUTHOR]

A ZrNPs/Fe3O4/GO nanocomposite was successfully synthesized for the first time with an in-situ method, and its properties were defined by energy-dispersive X-ray spectroscopy, scanning electron microscopy, and powder-XRD techniques. Synthesized nanocomposite was then used as a modifier to prepare modified glassy carbon electrodes for the determination of nitrite ions in foodstuffs. Differential pulse voltammetry and cyclic voltammetry studies showed a high catalytic activity of the proposed nanocomposite in nitrite oxidation. In addition, the electrode showed a linear response between 3 and 76 μM, a detection limit of 3 μM, and high selectivity. The synthesized nanocomposite was stable for at least 9 months, and the resultant electrode had similar stability. [ABSTRACT FROM AUTHOR]