NDLI: Voltammetric and amperometric determination of uric acid at a carbon-ceramic electrode modified with multi walled carbon nanotubes

Content Provider	Springer Nature Link
Author	Habibi, Biuck Pezhhan, Hamzhe Pournaghi Azar, Mohammad Hossien
Copyright Year	2010
Abstract	The voltammetric behavior of uric acid (UA) was studied at a carbon-ceramic electrode modified with multi walled carbon nanotubes; which was developed via a simple procedure. UA can be effectively oxidized at the surface of the electrode and produced an anodic peak at about 0.29 V in pH 6.8 phosphate buffer solutions. The experimental parameters such as pH, accumulation time, and amount of multi walled carbon nanotubes were optimized for determination of UA. Under the optimum conditions, the anodic peak current in differential pulse voltammetry is linear to the UA concentration over the range from 2.5×10−7M to 1.0×10−4 M with a correlation coefficient of 0.998. The electrode exhibited good stability and could be easily regenerated. The relative standard deviation of the peak current obtained for a 5.0 × 10−5 M UA solution was 1.0%. The influence of dopamine and ascorbic acid on the anodic peak current of UA was examined. This method was successfully applied for the determination of uric acid in human urine sample, and the recovery was 99.9%.
Starting Page	313
Ending Page	320
Page Count	8
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	169
Issue Number	3-4
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2010-04-15
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Multi walled carbon nanotube Carbon-ceramic electrode Electrocatalysis Uric acid Microengineering Analytical Chemistry Characterization and Evaluation of Materials Nanotechnology Nanochemistry
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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