Preparation and Characterization of a PVC/TTF-TCNQ Composite Electrode. Applications in a Flow Injection System
Autor
Cano, Manuel
Palenzuela, Beatriz
Rodríguez-Amaro, Rafael
Editor
Sociedade Portuguesa de ElectroquímicaFecha
2007Materia
TTF-TCNQComposite electrode
PVC
Ascorbic acid
Flow injection
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It was prepared a new polyvinyl chloride (PVC)/tetrathiafulvalene–
tetracyanoquinodimethane (TTF-TCNQ) composite electrode which showed good
physical and electrochemical characteristics. Different PVC/TTF-TCNQ–graphite
proportions were tested and the relation 1/10 (p/p) PVC/TTF-TCNQ provided the best
results in terms of sensitivity, coefficients of variation and mechanical resistance. This
electrode has interesting applications as a working electrode. So, employment is
remarkable in a flow injection system and had been satisfactory checked to detect
ascorbic acid. Also, the electrode exhibits selective voltammetric behaviour in aqueous
solution that affords its use as an ion detector.
The proposed electrode showed good kinetics property with a low background current
and a relatively reproducible signal. Moreover, the electrode can be prepared in a simple
way and its surface easily recovered