Polyaniline-based microelectrodes for sensing ascorbic acid in beverages
Polyaniline-based microelectrodes for sensing ascorbic acid in beverages
Thin films of polyaniline containing the dopant ions polyvinylsulfonate (PVS) and polystyrenesulfonate (PSS) have been prepared on 25 ?m Pt disk microelectrodes and tested for ascorbic acid oxidation in various buffers and in wine and orange juice containing solutions. A potential of 0.1 V (SCE) was found to be most suited for the amperometric determination of ascorbic acid in beverages diluted with a neutral pH buffer, with minimal interference from other oxidisable compounds. However, unknown wine and juice components lessen the ascorbic acid oxidation current through their interaction with the polyaniline layer.
electrodes, microelectrodes, wine, polyaniline, pss, pvs, oxidation, ascorbic acid, sensor
320-323
Kilmartin, Paul A.
6cff3df2-8fc2-4b1f-8b83-72ac23b26dd5
Martinez, A.
08e8e823-41fc-4ad0-b8e3-79d8823eb848
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
May 2008
Kilmartin, Paul A.
6cff3df2-8fc2-4b1f-8b83-72ac23b26dd5
Martinez, A.
08e8e823-41fc-4ad0-b8e3-79d8823eb848
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Kilmartin, Paul A., Martinez, A. and Bartlett, P.N.
(2008)
Polyaniline-based microelectrodes for sensing ascorbic acid in beverages.
Current Applied Physics, 8 (3-4), .
(doi:10.1016/j.cap.2007.10.021).
Abstract
Thin films of polyaniline containing the dopant ions polyvinylsulfonate (PVS) and polystyrenesulfonate (PSS) have been prepared on 25 ?m Pt disk microelectrodes and tested for ascorbic acid oxidation in various buffers and in wine and orange juice containing solutions. A potential of 0.1 V (SCE) was found to be most suited for the amperometric determination of ascorbic acid in beverages diluted with a neutral pH buffer, with minimal interference from other oxidisable compounds. However, unknown wine and juice components lessen the ascorbic acid oxidation current through their interaction with the polyaniline layer.
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Published date: May 2008
Keywords:
electrodes, microelectrodes, wine, polyaniline, pss, pvs, oxidation, ascorbic acid, sensor
Identifiers
Local EPrints ID: 54466
URI: http://eprints.soton.ac.uk/id/eprint/54466
PURE UUID: e9386382-5969-49d1-a18a-ff7ae85cb7c8
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Date deposited: 19 Aug 2008
Last modified: 16 Mar 2024 02:43
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Author:
Paul A. Kilmartin
Author:
A. Martinez
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