Charge-selective recognition at fibroin-modified electrodes for analytical application.
Anal Bioanal Chem
; 382(1): 80-4, 2005 May.
Article
en En
| MEDLINE
| ID: mdl-15900455
ABSTRACT
A novel fibroin-modified electrode with charge recognition is reported. The characteristics of silk fibroin membranes have been exploited for analytical applications. The membrane, with an isoelectric point of pH 4.5, was applied to graphite and carbon-fiber electrodes. The modified electrode was negatively charged in solutions of pH > 4.5, and so rejected anions and attracted cations. In solutions of pH < 4.5 the electrode was positively charged, and so rejected cations and attracted anions. The pH-responsive charge recognition of the modified electrode was investigated for some neurocompounds. A fibroin carbon-fiber electrode was used for in-vivo determination of the concentration of the cationic neurotransmitter dopamine (DA).
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Electrodos
/
Fibroínas
Límite:
Animals
Idioma:
En
Revista:
Anal Bioanal Chem
Año:
2005
Tipo del documento:
Article