Issue 46, 2020

A highly sensitive poly(chrysoidine G)–gold nanoparticle composite based nitrite sensor for food safety applications

Abstract

This work demonstrated the development of conducting poly(chrysoidine G) (PCG)–gold nanoparticle (AuNP)-modified fluorine-doped tin oxide (F : SnO2, FTO) film-coated glass electrodes for the sensitive electrochemical detection of nitrite (NO2). The homogeneously distributed PCG nanoparticle layer was deposited onto the FTO electrode by cyclic voltammetry sweeping. AuNPs were then anchored onto the PCG/FTO electrode by the chemical reduction of pre-adsorbed Au3+ ions. The as-prepared AuNP/PCG/FTO electrode exhibited excellent electrocatalytic activity for the oxidation of NO2 with high sensitivity (approximately 0.63 μA cm−2 μM−1) and a low limit of detection (0.095 μM), which is relevant within the normal concentration range of NO2 in human bodily fluids. The AuNP/PCG/FTO sensor showed sufficient reproducibility, repeatability, low interference, and strong recovery for NO2 detection in food samples. These results indicate that the AuNP/PCG nanocomposites have immense potential for the electrochemical detection of other biologically important compounds.

Graphical abstract: A highly sensitive poly(chrysoidine G)–gold nanoparticle composite based nitrite sensor for food safety applications

Supplementary files

Article information

Article type
Paper
Submitted
15 sen 2020
Accepted
06 noy 2020
First published
06 noy 2020

Anal. Methods, 2020,12, 5562-5571

A highly sensitive poly(chrysoidine G)–gold nanoparticle composite based nitrite sensor for food safety applications

S. A. Ansari, N. S. Lopa, N. Parveen, A. A. Shaikh and Md. M. Rahman, Anal. Methods, 2020, 12, 5562 DOI: 10.1039/D0AY01761B

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