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http://acervodigital.unesp.br/handle/11449/35476
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DC Field | Value | Language |
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dc.contributor.author | Santos, D. P. | - |
dc.contributor.author | Bergamini, M. F. | - |
dc.contributor.author | Fogg, A. G. | - |
dc.contributor.author | Zanoni, Maria Valnice Boldrin | - |
dc.date.accessioned | 2014-05-20T15:24:59Z | - |
dc.date.accessioned | 2016-10-25T17:59:19Z | - |
dc.date.available | 2014-05-20T15:24:59Z | - |
dc.date.available | 2016-10-25T17:59:19Z | - |
dc.date.issued | 2005-09-01 | - |
dc.identifier | http://dx.doi.org/10.1007/s00604-005-0374-z | - |
dc.identifier.citation | Microchimica Acta. Vienna: Springer Wien, v. 151, n. 1-2, p. 127-134, 2005. | - |
dc.identifier.issn | 1436-5073 | - |
dc.identifier.uri | http://hdl.handle.net/11449/35476 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/35476 | - |
dc.description.abstract | Glassy carbon electrodes were coated with films of poly( glutamic acid) ( PG), and the modified electrode proved to be very effective in the oxidation of caffeic acid. The performance of the film was also tested with ascorbic acid, coumaric acid, ferulic acid, sinapic acid and chlorogenic acid. At pH 5.6, all the hydroxycinnamic acids yield a higher peak current intensity when oxidized after incorporation in the PG-modified electrode, and only the oxidation of ascorbic acid exhibits overpotential reduction. At pH 3.5 only caffeic and chlorogenic acid are incorporated in the modified electrode and exhibit a well-defined oxidation wave at +0.51 V and +0.48 V, which is the base for their determination. Linear calibration graphs were obtained from 9 x 10(-6) mol L-1 to 4 x 10(-5) mol L-1 caffeic acid by linear voltammetric scan and from 4 x 10(-6) mol L-1 to 3 x 10(-5) mol L-1 by square wave voltammetric scan. The method was successfully applied to the determination of caffeic acid in red wine samples without interference from other hydroxycinnamic acids or ascorbic acid. | en |
dc.format.extent | 127-134 | - |
dc.language.iso | eng | - |
dc.publisher | Springer | - |
dc.source | Web of Science | - |
dc.subject | hydroxycinnamates | pt |
dc.subject | caffeic acid | pt |
dc.subject | poly(glutamic acid) | pt |
dc.subject | modified electrode | pt |
dc.title | Application of a glassy carbon electrode modified with poly(glutamic acid) in caffeic acid determination | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Univ Luton | - |
dc.contributor.institution | Loughborough Univ Technol | - |
dc.description.affiliation | Univ Estadual Paulista, Inst Quim, Dept Quim Analit, BR-14800900 Araraquara, SP, Brazil | - |
dc.description.affiliation | Univ Luton, Luton Inst, Luton LU1 5DU, Beds, England | - |
dc.description.affiliation | Loughborough Univ Technol, Loughborough LE11 3TU, Leics, England | - |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Quim, Dept Quim Analit, BR-14800900 Araraquara, SP, Brazil | - |
dc.identifier.doi | 10.1007/s00604-005-0374-z | - |
dc.identifier.wos | WOS:000231797900017 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Microchimica Acta | - |
dc.identifier.orcid | 0000-0002-2296-1393 | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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