Selective determination of nitrite in water and food samples using zirconium oxide (ZrO₂)@MWCNTs modified screen printed electrode

Abstract

An electrochemical assay using a disposable nano-sensor chip ZrO2@MWCNTs screen printed electrode for rapid, selective, and sensitive determination of nitrite in food and water samples. Real food and water sample analysis was conducted, and a high recovery was achieved.

Comparison of the analytical performance of two different electrochemical sensors based on a composite of gold nanorods with carbon nanomaterials and PEDOT:PSS for the sensitive detection of nitrite in processed meat products

“…Various conductive nanomaterials and their composites, such as reduced graphene oxide, 32,33 multiwalled carbon nanotubes (MWCNTs), 34,35 metal-organic frameworks, 36,37 metal oxides, 38,39 MXenes, 40,41 and layered double hydroxides, 42 have been employed for nitrite detection to obtain a better current response than conventional electrodes. All these types of nanomaterials can be composited with conductive polymers, e.g., poly (3,4dioxythiophene):polystyrenesulfonate (PEDOT:PSS), 43,44 polypyrrole, 45 polythiophene, 46 and polyaniline, 47,48 to enhance electrode conductivity.…”