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Type: Artigo de evento
Title: Potassium Transport Through Liquid Membranes Using Spectral And Chemometric Methods
Author: Antunes A.M.
Ferreira M.M.C.
Melgo M.S.
Volpe P.L.O.
Abstract: Chemometric techniques were applied to follow the transport of potassium through a chloroform membrane, using ternary mixtures of the isomeric anions, 2,4-dinitrophenolate (2,4-DNP) and 2,5-dinitrophenolate (2,5-DNP) with also 2-nitrophenolate (ortho-). Some spectral differences can be observed in the UV-Vis region, although 2,4- and 2,5-DNP have very similar spectra. Using the trilinear decomposition method (TLD), it is possible to estimate the spectra of the pure components and simultaneously their kinetic profiles. The estimated spectral profiles are in excellent agreement with experimental results and the kinetic profiles agree with those obtained by ordinary least squares (OLS). The transport rates are calculated and compared. The ortho- isomer has a very small rate of transport.
Rights: fechado
Identifier DOI: 10.1016/S0022-2860(98)00823-0
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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