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Interference-Free Electrochemical Detection of Nanomolar Dopamine Using Doped Polypyrrole and Silver Nanoparticles
University of Calcutta, India.
University of Calcutta, India.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-1815-9699
2014 (English)In: Electroanalysis, ISSN 1040-0397, E-ISSN 1521-4109, Vol. 26, no 10, 2197-2206 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a new approach to detect dopamine in nanomolar range using an electrochemical sensor utilizing a composite made of chitosan-stabilized silver nanoparticles and p-toluene sulfonic acid-doped ultrathin polypyrrole film. Studies included cyclic voltammogram, amperometry, differential pulse voltammetry and also investigation by electrochemical impedance spectroscopy. A detection limit of 0.58 nM was achieved in the linear range 1 x 10(-9) M to 1.2 x 10(-7) M. High sensitivity towards DA, good reproducibility and long-term stability have been demonstrated without interference from ascorbic acid, uric acid, epinephrine, l-dopa, glucose. The sensing system was successfully applied for quantitative determination of dopamine in commercially available human blood serum.

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2014. Vol. 26, no 10, 2197-2206 p.
Keyword [en]
Dopamine; Polypyrrole; Silver nanoparticles; Selectivity; Impedance
National Category
Biological Sciences
URN: urn:nbn:se:liu:diva-112650DOI: 10.1002/elan.201400332ISI: 000343927400016OAI: diva2:768940

Funding Agencies|DST (INSPIRE), New Delhi

Available from: 2014-12-05 Created: 2014-12-05 Last updated: 2014-12-17

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