Nano Archive

Voltammetric analysis of uric acid by zinc-nickel nanoalloy coated composite graphite

Tehrani, Ramin M. A and Ab Ghani, Sulaiman (2010) Voltammetric analysis of uric acid by zinc-nickel nanoalloy coated composite graphite. SENSORS AND ACTUATORS B-CHEMICAL . ISSN 0925-4005

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Abstract

The nanocrystalline single-phase gamma-Zn3Ni alloy modified composite graphite (nano-gamma-Zn3Ni/CG) was employed for the detection of uric acid (UA) by voltammetric techniques. The non-enzymatic modified electrode had an excellent response and specificity for the electrocatalytic oxidation of UA in 0.2 M phosphate buffer (PB) (pH 7.0) at 280 mV vs. Ag/AgCl as compared to bare CG electrode at 360 mV. A limit of detection (S/N =3) at 0.2 mu M and concentration linear range of 1-400 mu M UA were obtained. The presence of ascorbic acid (AA) did not interfere in the measurement. The nano-gamma-Zn3Ni/CG was used for the determination of UA in untreated human urine and serum samples with satisfactory results.

Item Type:Article
Uncontrolled Keywords:GLASSY-CARBON ELECTRODE; ASCORBIC-ACID; ELECTROCHEMICAL DETECTION; GOLD NANOPARTICLES; ALLOY; NANOTUBES; BIOSENSOR; DOPAMINE; GLUCOSE; FILM
Subjects:Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:9219
Deposited By:CSMNT
Deposited On:19 May 2010 04:05
Last Modified:19 May 2010 04:06

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