A novel platform of using copper (II) complex with triazole-carboxilated modified as bidentated ligand SPCE to a recognition of milk contamination with hydroxide peroxide

Quezada, Víctor; Martínez, Tamara; Nelson, Ronald; Pérez-Fehrmann, Marcia; Zaragoza, Guillermo; Kesternich, Víctor and Hernández-Saravia, Lucas Patricio

Keywords: [cu(bmtc)2(H2O)] Hydrogen peroxide Milk Amperometry Electrochemical sensor

Abstract

A screen-printed carbon electrode (SPCE) modified with copper (II) 1-(3-bromobenzyl)-5-methyl-1H-1,2,3-triazole-4- carboxylate [Cu(bmtc)2(H2O)] and was used as an electrochemical sensor of hydrogen peroxide. The material was characterised by crystal X-ray and cyclic voltammetry. The electrochemical behaviour of the modified electrode [Cu (bmtc)2(H2O)]/SPCE was evaluated against bare SPCE for the reduction of 1.0 mM H2O2 in phosphate buffer (pH = 7.0), where the modified electrode responded ~ −0.55 V even though the SPCE did not present response. On the other hand, analytical parameters such as reproducibility (2.7%), repeatability (2.6%), LOD (5.8 × 10−7 mol L−1), selectivity (physiological substances) and stability were evaluated.

Más información

Título de la Revista: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volumen: 879
Editorial: Elsevier
Fecha de publicación: 2020
Página de inicio: 114763
Página final: 114783
Idioma: Inglés
Financiamiento/Sponsor: Universidad Católica del Norte
Notas: WOS