Capacitive chemical sensor for fenvalerate assay based on electropolymerized molecularly imprinted polymer as the sensitive layer.
Anal Bioanal Chem
; 379(2): 302-7, 2004 May.
Article
en En
| MEDLINE
| ID: mdl-15042267
A capacitive chemical sensor for fenvalerate is reported. By using ac impedance measurements the sensor has been based on the decrease in capacitance caused by the analyte used as the template in the formulation of an electropolymerized molecularly imprinted polymer as receptor layer. Improvement of the insulating properties of the sensor was investigated in detail. The capacitive sensor was prepared by a deposition of a self-assembled monolayer of 2-mercaptobenzimidazole (2-MBI) before electropolymerization of 2-MBI and subsequent treatment with n-dodecanethiol to eliminate pinholes and defects in the polymerized 2-MBI film. From the calibration curve concentrations of fenvalerate up to 9 microg mL(-1) could be detected with a linear determination range up to 5 microg mL(-1) and a detection limit of 0.36 microg mL(-1). No significant interference was observed from common pyrethroid insecticides.
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Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Anal Bioanal Chem
Año:
2004
Tipo del documento:
Article
Pais de publicación:
Alemania