Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers

Maza, Eliana MaríaIcon ; Fernandez, HectorIcon ; Zon, María AliciaIcon ; Moressi, Marcela Beatriz
Fecha de publicación: 04/2017
Editorial: Elsevier Science Sa
Revista: Journal of Electroanalytical Chemistry
ISSN: 1572-6657
e-ISSN: 0022-0728
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

The electro-oxidation of fisetin (FIS) at gold electrodes modified with self-assembled monolayers (SAM) is studied in 15% dimethylsulfoxide + 85% phosphate buffer solutions of different pH using cyclic and square wave voltammetries. Gold electrodes were modified with 2-mercaptoethanesulfonic acid (2-MES) and 4-mercaptophenol (4-MP). Both modified electrodes were characterized by reductive desorption, electrochemical impedance spectroscopy, contact angle measurements, and by the determination of the apparent surface pKa. The FIS first oxidation peak showed an electrode process controlled by diffusion at 2-MES modified gold electrodes, while the electrode process showed a diffusion/adsorption mixed control at 4-MP modified gold electrodes. Square wave voltammetry was used to perform the FIS quantitative determination at both modified electrodes using the commercial reagent. Calibration curves were linear in the concentration range from 1 × 10− 7 to 1 × 10− 4 M and from 1 × 10− 6 to 1 × 10− 5 M for 2-MES and 4-MP SAM modified electrodes, respectively. Limits of detection for a 3:1 signal to noise ratio were 5 × 10− 8 M (14.3 ppb) and 5 × 10− 7 M (143 ppb) for 2-MES and 4-MP modified electrodes, respectively. The reproducibility and the repeatability were 2.2% and 0.5% for 2-MES SAM modified electrodes, and 1.6% and 1.3% for 4-MP SAM modified electrodes, respectively.
Palabras clave: Cyclic Voltammetry , Fisetin , Flavonoid , Self-Assembled Monolayers , Square Wave Voltammetry
Ver el registro completo
 
Archivos asociados
Thumbnail
 
Tamaño: 1.847Mb
Formato: PDF
.
Descargar
Licencia
info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/74574
URL: https://www.sciencedirect.com/science/article/pii/S157266571730125X
DOI: http://dx.doi.org/10.1016/j.jelechem.2017.02.030
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
Maza, Eliana María; Fernandez, Hector; Zon, María Alicia; Moressi, Marcela Beatriz; Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers; Elsevier Science Sa; Journal of Electroanalytical Chemistry; 790; 4-2017; 1-10
Compartir
Altmétricas
 

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES