Simultaneous determination of dopamine and uric acid using layer-by-layer graphene and chitosan assembled multilayer films.
Talanta
; 117: 359-65, 2013 Dec 15.
Article
de En
| MEDLINE
| ID: mdl-24209353
ABSTRACT
Multilayer films containing graphene (Gr) and chitosan (CS) were prepared on glassy carbon electrodes with layer-by-layer (LBL) assembly technique. After being characterized with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM), the electrochemical sensor based on the resulted films was developed to simultaneously determine dopamine (DA) and uric acid (UA). The LBL assembled electrode showed excellent electrocatalytic activity towards the oxidation of DA and UA. In addition, the self-assembly electrode possessed an excellent sensing performance for detection of DA and UA with a linear range from 0.1 µM to 140 µM and from 1.0 µM to 125 µM with the detection limit as low as 0.05 µM and 0.1 µM based on S/N=3, respectively.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Acide urique
/
Dopamine
/
Chitosane
/
Graphite
Langue:
En
Journal:
Talanta
Année:
2013
Type de document:
Article