Voltammetric determination of thiomersal with a new modified electrode based on a carbon paste electrode decorated with La2O3

Johisner Penagos-Llanos, Jorge A. Calderón, Edgar Orlando Nagles Vidal, Jhon J. Hurtado

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

10 Citas (Scopus)

Resumen

A carbon-paste modified electrode decorated with La2O3 (LaOx/CPE) is reported for the first time for the voltammetric determination of thiomersal (THM) content. The LaOx/CPE surface was characterized using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The presence of La2O3 on the surface of the carbon paste reduces the charge transfer resistance and improves the sensitivity toward the oxidation of THM, with an oxidation current increase of almost 60% and allows its determination by square-wave stripping voltammetry (SWSV). The detection limit (3σ/b) was 0.09 μmol L−1 and the relative standard deviation was 2.5% (n = 7) with three different electrodes. Furthermore, the new sensor was applied in the detection of THM in vaccines and pharmaceutical dosages.

Idioma originalInglés
Páginas (desde-hasta)536-542
Número de páginas7
PublicaciónJournal of Electroanalytical Chemistry
Volumen833
DOI
EstadoPublicada - 15 ene 2019
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'Voltammetric determination of thiomersal with a new modified electrode based on a carbon paste electrode decorated with La<sub>2</sub>O<sub>3</sub>'. En conjunto forman una huella única.

Citar esto