NDLI: Simultaneous determination of uric acid and ascorbic acid at the film of chitosan incorporating cetylpyridine bromide modified glassy carbon electrode

Content Provider	Springer Nature Link
Author	Cao, Xiaomei Xu, Yanhong Luo, Liqiang Ding, Yaping Zhang, Ying
Copyright Year	2009
Abstract	A glassy carbon electrode (GCE) modified with the film composed of chitosan incorporating cetylpyridine bromide is constructed and used to determine uric acid (UA) and ascorbic acid (AA) by differential pulse voltammetry (DPV). This modified electrode shows efficient electrocatalytic activity and fairly selective separation for oxidation of AA and UA in mixture solution. UA is catalyzed by this modified electrode in phosphate buffer solution (pH 4.0) with a decrease of 80 mV, while AA is catalyzed with a decrease of 200 mV in overpotential compared to GCE, and the peak separation of oxidation between AA and UA is 260 mV, which is large enough to allow the determination of one in presence of the other. Under the optimum conditions, the anodic peak currents (I pa) of DPV are proportional to the concentration of UA in the range of 2.0 × 10−6 to 6.0 × 10−4 M, with the detection limit of 5.0 × 10−7 M at a signal-to-noise ratio of 3 (S/N = 3) and to that of AA in the range of 4.0 × 10−6 to 1.0 × 10−3 M, with the detection limit of 8.0 × 10−7 M (S/N = 3).
Starting Page	829
Ending Page	834
Page Count	6
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	14
Issue Number	5
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-05-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cetylpyridine bromide Chitosan Simultaneous determination Ascorbic acid Uric acid Electrical Engineering Condensed Matter Physics Characterization and Evaluation of Materials Industrial Chemistry/Chemical Engineering Analytical Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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