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- Title
Fabrication of layer-by-layer deposited films containing carbon nanotubes and poly(malachite green) as a sensor for simultaneous determination of ascorbic acid, epinephrine, and uric acid.
- Authors
RAOOF, Jahan Bakhsh; OJANI, Reza; BAGHAYERI, Mehdi
- Abstract
A simple approach to constructing a double-layer voltammetric sensor is described. The poly (malachite green) (PMG) and multiwalled carbon nanotubes (MWCNTs) were coimmobilized at the surface of the glassy carbon electrode (GCE) for fabrication of PMG/MWCNT/GCE. The modified electrode was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV), and chronoamperometric tech- niques. Using DPV, the obtained catalytic peak current was linearly dependent on the ascorbic acid (AA), epinephrine (EP), and uric acid (UA) concentrations in the ranges of 0.4-100.0, 0.1-100.0, and 0.3-90.0 fiM, respectively. The resultant detection limits for AA, EP, and UA were 0.23, 0.0820, and 0.12 /iM, respectively. The modified electrode showed good sensitivity, selectivity, and stability and was applied to the determination of AA, EP, and UA in real samples.
- Subjects
MULTIWALLED carbon nanotubes; MALACHITE green; DETECTORS; VITAMIN C; ADRENALINE; URIC acid; POLYMERS; CYCLIC voltammetry
- Publication
Turkish Journal of Chemistry, 2013, Vol 37, Issue 1, p36
- ISSN
1300-0527
- Publication type
Article
- DOI
10.3906/kim-1112-54