| Simultaneous determination of ascorbic acid, dopamine, uric acid and tryptophan on gold nanoparticles/overoxidized-polyimidazole composite modified glassy carbon electrode. | |
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MedLine Citation:
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PMID: 22840700 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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A novel electrode was developed through electrodepositing gold nanoparticles (GNPs) on overoxidized-polyimidazole (PImox) film modified glassy carbon electrode (GCE). The combination of GNPs and the PImox film endowed the GNPs/PImox/GCE with good biological compatibility, high selectivity and sensitivity and excellent electrochemical catalytic activities towards ascorbic acid (AA), dopamine (DA), uric acid (UA) and tryptophan (Trp). In the fourfold co-existence system, the peak separations between AA-DA, DA-UA and UA-Trp were large up to 186, 165 and 285mV, respectively. The calibration curves for AA, DA and UA were obtained in the range of 210.0-1010.0μM, 5.0-268.0μM and 6.0-486.0μM with detection limits (S/N=3) of 2.0μM, 0.08μM and 0.5μM, respectively. Two linear calibrations for Trp were obtained over ranges of 3.0-34.0μM and 84.0-464.0μM with detection limit (S/N=3) of 0.7μM. In addition, the modified electrode was applied to detect AA, DA, UA and Trp in samples using standard addition method with satisfactory results. |
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Authors:
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Cun Wang; Ruo Yuan; Yaqin Chai; Shihong Chen; Fangxin Hu; Meihe Zhang |
Publication Detail:
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Type: Journal Article Date: 2012-07-04 |
Journal Detail:
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Title: Analytica chimica acta Volume: 741 ISSN: 1873-4324 ISO Abbreviation: Anal. Chim. Acta Publication Date: 2012 Sep |
Date Detail:
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Created Date: 2012-07-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370534 Medline TA: Anal Chim Acta Country: Netherlands |
Other Details:
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Languages: eng Pagination: 15-20 Citation Subset: IM |
Copyright Information:
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Copyright © 2012 Elsevier B.V. All rights reserved. |
Affiliation:
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Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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