Publicación:
Adsorptive Stripping Voltammetric Determination of Morin in Tea Infusions and Chocolate Drinks on a Gold Electrode. Effect of Cetylpyridinium Bromide on the Sensitivity of the Method

dc.contributor.authorArancibia, Verónica
dc.contributor.authorGarcía-Beltrán, Olimpo
dc.contributor.authorHurtado, John
dc.contributor.authorNagles, Edgar
dc.date.accessioned2019-03-04T16:38:58Z
dc.date.available2019-03-04T16:38:58Z
dc.date.issued2017-09-12
dc.description.abstractThe use of a gold electrode to determine Morin (MO) in the presence of two polyphenolic compounds as Quercetin (Q) and Rutin (RU) by cyclic and adsorptive stripping voltammetry is reported. The effects of various operational parameters such as pH, supporting electrolyte, adsorptive potential and time (Eads, tads) were optimized. The optimum experimental conditions chosen were: pH 3.0 (phosphate buffer 0,001 mol L-1 ), Eads:−0.20 V and tads: 60s. Under these conditions MO was oxidized at +0.49 V and the linear calibration curves ranged from 0.5 and 5.6 μmol L–1 . When cetylpyridinium bromide (CPB) was added to the electrochemical cell, a Morin/CPB aggregate was formed, increasing the peak current of MO for at least 30 % than in the absence of this cationic surfactant, and the detection limit changed from 0.40 to 0.083 μmol L-1 with 15.0 mol L-1 of CPB. The method was validated determining MO in two water samples spiked with MO, Q and RU and finally, was successfully applied to the determination of MO in tea infusions and chocolate drinks samples.es_CO
dc.identifier.citationArancibia, V., Gracía-Beltrán, O., Hurtado, J., & Nagles, E. (2017). Adsorptive stripping voltammetric determination of morin in tea infusions and chocolate drinks on a gold electrode. Effect of cetylpyridinium bromide on the sensitivity of the method. International Journal of Electrochemical Science, 12(10), 9408–9417.es_CO
dc.identifier.issn1452-3981
dc.identifier.urihttp://www.electrochemsci.org/papers/vol12/121009408.pdf
dc.language.isoenes_CO
dc.publisherInternational Journal of Electrochemical Scienceses_CO
dc.subjectMorines_CO
dc.subjectGold electrodees_CO
dc.subjectAdsorptive stripping voltammetryes_CO
dc.subjectTea drinkes_CO
dc.subjectChocolate drinkes_CO
dc.titleAdsorptive Stripping Voltammetric Determination of Morin in Tea Infusions and Chocolate Drinks on a Gold Electrode. Effect of Cetylpyridinium Bromide on the Sensitivity of the Methodes_CO
dc.typeArticlees_CO
dspace.entity.typePublication
eperson.emailjose.garcia@unibague.edu.coes_CO
Archivos
Bloque de licencias
Mostrando1 - 1 de 1
Cargando...
Miniatura
Nombre:
license.txt
Tamaño:
134 B
Formato:
Item-specific license agreed upon to submission
Descripción:
Colecciones