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dc.contributor.authorNeto, A. A.-
dc.contributor.authorDrigo Filho, Elso-
dc.contributor.authorFossey, Marcelo Andrés-
dc.contributor.authorNeto, J. R.-
dc.identifier.citationJournal of Physical Chemistry B. Washington: Amer Chemical Soc, v. 103, n. 32, p. 6809-6814, 1999.-
dc.description.abstractA model describing dissociation of monoprotonic acid and a method for the determination of its pK value are presented. The model is based on a mean field approximation. The Poisson-Boltzmann equation, adopting spherical symmetry, is numerically solved, and the solution of its linearized form is written. By use of the pH values of a dilution experiment of galacturonic acid as the entry data, the proposed method allowed estimation of the value of pK = 3.25 at a temperature of 25 degrees C. Values for the complex dimensions and dissociation degree are calculated using experimental pH values for solution concentration values ranging from 0.1 to 60 mM. The present analysis leads to the conclusion that the Poisson-Boltzmann equation or its linear form is equally suited for the description of such systems.en
dc.publisherAmer Chemical Soc-
dc.sourceWeb of Science-
dc.titlepK determination. A mean field, Poisson-Boltzmann approachen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUNESP, Dept Fis, Inst Biociencias Letras & Ciências Exatas, BR-15054000 Sao Jose Dos Campos, SP, Brazil-
dc.description.affiliationUnespUNESP, Dept Fis, Inst Biociencias Letras & Ciências Exatas, BR-15054000 Sao Jose Dos Campos, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Physical Chemistry B-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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