Journal
ANALYTICA CHIMICA ACTA
Volume 634, Issue 1, Pages 49-53Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2008.12.029
Keywords
Porous pseudo-carbon paste electrode; Tannic acid; Electrochemical sensor; Anodic stripping voltammetry
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Funding
- National Natural Science Foundation of China [60571032, 90606027]
- Chinese 863 High Tech Project [2007AA022007]
- Hunan Science Foundation [2007FJ4050]
- Hunan Natural Science Foundation
- Scientific Research Fund of Hunan Provincial Education Department [08C294]
- Higher Education for Funding of China [20050286014]
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The electrochemical responses of tannic acid have been obtained at porous pseudo-carbon paste electrode (PPCPE), polypyrrole modified carbon paste electrode (PCPE), SBA-15 modified CPE (SBA-MCPF) and carbon paste electrode (CPE) under same conditions, respectively. The results show that the sensitivity of PPCPE is the highest among all the checked electrodes. The detection limit at PPCPE is 0.01 mu M, which is about 10 times lower than that at CPE and is about 5 times lower than that at PCPE or SBA-MCPE. The developed electrode PPCPE possesses a few obvious advantages and no binding reagents are needed. The surface area of PPCPE is 59.26 m(2)g-(1) With Pores ranging from 2 to 5 mu m in diameter. The PPCPE is easy to preserve and has good reusability, which affords a nice electrochemical platform for detecting tannic acid. (C) 2008 Elsevier B.V. All rights reserved.
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