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

dc.creatorPenagos Llanos, Johisner
dc.creatorCalder?n, Jorge A.
dc.creatorNagles, Edgar
dc.creatorHurtado, Jhon J.
dc.date2019-05-23T14:37:36Z
dc.date2019-05-23T14:37:36Z
dc.date2019-01-15
dc.date.accessioned2023-08-31T19:03:46Z
dc.date.available2023-08-31T19:03:46Z
dc.identifierPenagos-Llanos, J., Calder?n, J. A., Nagles, E., & Hurtado, J. J. (2019). Voltammetric determination of thiomersal with a new modified electrode based on a carbon paste electrode decorated with La2O3. Journal of Electroanalytical Chemistry, 833, 536-542.
dc.identifier1572-6657
dc.identifierhttps://www.sciencedirect.com/science/article/pii/S1572665718308506?via%3Dihub
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8555089
dc.descriptionA 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 (3?/b) was 0.09 ?mol 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.
dc.languageen
dc.publisherJournal of Electroanalytical Chemistry
dc.subjectLanthanum (III) oxide
dc.subjectCarbon paste
dc.subjectThiomersal
dc.subjectVaccines
dc.subjectSquare wave stripping voltammetry
dc.titleVoltammetric determination of thiomersal with a new modified electrode based on a carbon paste electrode decorated with La2O3
dc.typeArticle


Este ítem pertenece a la siguiente institución