| Simultaneous determination of dopamine and its oxidized product (aminochrom), by hydrodynamic amperometry and anodic stripping voltammetry, using the metallic palladium and uranalyl hexacyanoferrate coated aluminum electrodes. | |
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MedLine Citation:
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PMID: 19963367 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In the present work, the development of an effective electroanalytical strategy for the simultaneous determination of dopamine (DA) and aminochrom (AC) using hydrodynamic amperometry and anodic stripping voltammetry (ASV) on the Al modified electrodes is described. For this purpose the Al electrode is plated with metallic palladium (Pd-Al) by simple dipping procedure and subsequently the uranyl hexacyanoferrate (K(2)UO(2)[Fe(CN)(6)]) is deposited electrochemically on the Pd-Al electrode from a UO(2)(2+)+Fe(CN)(6)(3-) solution. The Pd-Al electrode is used for hydrodynamic amperometric measurement of DA at constant electrode potential of 0.35 V in a stirred electrolyte solution. At fixed operational conditions, the calibration graph for amperometry was linear over the DA concentration range 1x10(-6) to 50x10(-6)M. The detection limit of DA was 4.1x10(-7) M. Whereas the decrease of the ASV current of the K(2)UO(2)[Fe(CN)(6)]/Pd-Al electrode prepared in the presence of AC was the principal of the AC determination. This decrease was proportional to the AC concentration in the solution, during K(2)UO(2)[Fe(CN)(6)]/Pd-Al electrode preparation and the calibration graph was linear over the concentration range 1x10(-6) to 35x10(-6) M of AC. The detection limit was 4.5x10(-7) M AC. |
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Authors:
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M H Pournaghi-Azar; H Dastangoo; R Fadakar bajeh baj |
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Publication Detail:
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Type: Evaluation Studies; Journal Article Date: 2009-11-11 |
Journal Detail:
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Title: Biosensors & bioelectronics Volume: 25 ISSN: 1873-4235 ISO Abbreviation: Biosens Bioelectron Publication Date: 2010 Feb |
Date Detail:
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Created Date: 2010-02-03 Completed Date: 2010-04-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9001289 Medline TA: Biosens Bioelectron Country: England |
Other Details:
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Languages: eng Pagination: 1481-6 Citation Subset: IM |
Copyright Information:
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Copyright 2009 Elsevier B.V. All rights reserved. |
Affiliation:
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Faculty of Chemistry, University of Tabriz, Tabriz, Iran. Pournaghiazar@tabrizu.ac.ir |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biosensing Techniques
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instrumentation* Coated Materials, Biocompatible / chemistry Complex Mixtures / analysis Conductometry / instrumentation*, methods Dopamine / analysis*, chemistry Electrodes* Equipment Design Equipment Failure Analysis Ferrocyanides / chemistry* Indolequinones / analysis*, chemistry Oxidation-Reduction Palladium / chemistry* Reproducibility of Results Sensitivity and Specificity |
| Chemical | |
Reg. No./Substance:
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0/Coated Materials, Biocompatible; 0/Complex Mixtures; 0/Ferrocyanides; 0/Indolequinones; 0/ferrocyn; 39984-17-3/aminochrome 1; 7440-05-3/Palladium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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