Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 398, Issue 4, Pages 1675-1685Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-010-3966-3
Keywords
Multiwalled carbon nanotubes; Poly(neutral red); Ascorbate; Modified electrodes
Funding
- Fundacao para a Cincia e a Tecnologia (FCT) [PTDC/QUI/65255/2006, PTDC/QUI/65732/2006, POCI 2010]
- FCT [SFRH/BD/46496/2008, SFRH/BPD/46635/2008]
- Fundação para a Ciência e a Tecnologia [PTDC/QUI/65255/2006, PTDC/QUI/65732/2006, SFRH/BD/46496/2008, SFRH/BPD/46635/2008] Funding Source: FCT
Ask authors/readers for more resources
The electrochemical behaviour of glassy carbon electrodes coated with multiwalled carbon nanotubes (MWCNT) from three different sources and with different loadings has been compared, with a view to sensor applications. Additionally, poly(neutral red) (PNR) was electrosynthesised by potential cycling on bare glassy carbon and on MWCNT-modified glassy carbon electrodes, and characterised by cyclic voltammetry and scanning electron microscopy. Well-defined voltammetric responses were observed for hexacyanoferrate (II) oxidation with differences between the MWCNT types as well as from loading. The MWCNT and PNR/MWCNT-modified electrodes were applied to the oxidative determination of ascorbate, the electrocatalytic effects observed varying according to the type of nanotubes. Comparison was made with electrodes surface-modified by graphite powder. All modified electrode configurations with and without PNR were successfully employed for ascorbate oxidation at +0.05 V vs saturated calomel electrode with detection limits down to 4 mu M; good operational stability and storage stability were also obtained.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available