NDLI: Fabrication of a fast, simple and sensitive voltammetric sensor for the simultaneous determination of 4-aminohippuric acid and uric acid using a functionalized multi-walled carbon nanotube modified glassy carbon electrode

Content Provider	Royal Society of Chemistry (RSC)
Author	Ojani, Reza Baghayeri, Mehdi Ahmadi, Farzaneh Raoof, Jahan Bakhsh
Copyright Year	2012
Abstract	In the present study, for the first time, a simple and rapid electrochemical sensor was developed for the simultaneous determination of 4-aminohippuric acid (PAH) and uric acid (UA), based on the excellent properties of functionalized multi-walled carbon nanotubes (fMWCNTs). A glassy carbon electrode was modified via drop casting the suspension of fMWCNT onto its surface and then the modified electrode was used for the measurement. The electrochemical response characteristics of the modified electrode toward PAH and UA were investigated using cyclic voltammetry, differential pulse voltammetry and chronoamperometry. The values of transfer coefficient for oxidation of PAH and UA were calculated using electrochemical approaches and were found to be 0.43 and 0.46, respectively. PAH and UA in a mixture can be measured individually and simultaneously by differential pulse voltammetry. At the optimum pH of 6.0 in 0.1 M phosphate buffer solution, differential pulse voltammograms increase linearly with PAH and UA concentrations over the concentration ranges of 10–1000 μM of PAH and 1–100 μM of UA. The detection limits for PAH and UA were found to be 7.82 μM and 0.96 μM, respectively. The proposed method was also successfully applied to the determination of PAH and UA in real samples.
Starting Page	1825
Ending Page	1832
Page Count	8
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	6
Journal	Analytical Methods
DOI	10.1039/c2ay05900b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Acid Electrode Urban area UA Heat transfer coefficient Buffer solution Carbon Carbon nanotube Cyclic voltammetry Phosphate Electrochemistry PH Chronoamperometry Differential pulse voltammetry
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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