Selective detection of dopamine in presence of ascorbic acid by use of glassy-carbon electrode modified with amino-beta-cyclodextrin and carbon nanotubes

Abstract : A glassy carbon electrode modified with per-6-amino-beta-cyclodextrin (beta-CDNH2) and functionalized single-walled carbon nanotubes (SWCNT-COOH) was elaborated. This structure was investigated for the detection of dopamine acid (DA) in presence of ascorbic acid (AA). The sensor behavior was studied by cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy. The analysis results show that the electrode modification with CD derivative improves the sensitivity and selectivity of the DA recognition; the electrochemical response was further improved by introduction of SWCNT-COOH. The sensor shows good and reversible linear response toward DA within the concentration range of 7 x 10(-7)-10(-4) M with a detection limit of 5 x 10(-7) M
Document type :
Journal articles
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01230127
Contributor : Agnès Bussy <>
Submitted on : Tuesday, November 17, 2015 - 6:18:22 PM
Last modification on : Wednesday, September 12, 2018 - 10:00:07 AM

Links full text

Identifiers

Collections

Citation

Aymen Gaied, Nejmeddine Jaballah, Monce Tounsi, Mohamed Braiek, Nicole Jaffrezic-Renault, et al.. Selective detection of dopamine in presence of ascorbic acid by use of glassy-carbon electrode modified with amino-beta-cyclodextrin and carbon nanotubes. Electroanalysis, Wiley-VCH Verlag, 2014, 26 (12), pp.2747-2753. ⟨10.1002/elan.201400477⟩. ⟨hal-01230127⟩

Share

Metrics

Record views

110