A nonenzymatic sensor for xanthine based on electrospun carbon nanofibers modified electrode

Tang, Xiaofeng, Liu, Yang, Hou, Haoqing, and You, Tianyan (2011) A nonenzymatic sensor for xanthine based on electrospun carbon nanofibers modified electrode. Talanta, 83 (5). pp. 1410-1414.

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Abstract

Xanthine (Xa) determination is of considerable importance in clinical analysis and food quality control. Therefore, a sensitive nonenzymatic amperometric sensor for Xa based on carbon nanofibers (CNFs) has been proposed. The CNFs, which were prepared by electrospinning technique and subsequent thermal treatment, were used to modify carbon paste electrode (CNF-CPE) to construct the amperometric sensor device without any oxidation pretreatment. In application to Xa electrochemical determination, the CNF-CPE exhibited high electrocatalytic activity and fast amperometric response. Various experimental parameters, such as pH and applied potential were optimized. Under the optimal conditions, the dynamic linear range of Xa was 0.03–21.19 μM (R = 0.9992) with the detection limit low to 20 nM (S/N = 3). With good selectivity and sensitivity, the present system was successfully applied to estimate the freshness of fish and determine Xa in human urine, which provides potential application in food quality control and clinical analysis.

Item ID: 54404
Item Type: Article (Research - C1)
ISSN: 1873-3573
Keywords: carbon nanofibers; electrospinning; xanthine; electrocatalytic oxidation
Funders: National Natural Sciences Foundation of China (NNSFC), Chinese Academy of Sciences (CAS)
Projects and Grants: NNSFC 20875085, CAS KJCX2-YW-H11
Date Deposited: 03 Jul 2018 04:50
FoR Codes: 03 CHEMICAL SCIENCES > 0301 Analytical Chemistry > 030102 Electroanalytical Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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