Tangential-flow ultrafiltration: a versatile methodology for determination of complexation parameters in refractory organic matter from Brazilian water and soil samples
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Data
2003-04-01
Autores
Romao, LPC
Castro, G. R.
Rosa, A. H.
Rocha, J. C.
Padilha, P. M.
Silva, H. C.
Título da Revista
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Título de Volume
Editor
Springer
Resumo
In this work the copper(II) complexation parameters of aquatic organic matter, aquatic and soil humic substances from Brazilian were determined using a new versatile approach based on a single-stage tangential-flow ultrafiltration (TF-UF) technique (cut-off 1 kDa) and sensitive atomic spectrometry methods. The results regarding the copper(II) complexation capacity and conditional stability constants obtained for humic materials were compared with those obtained using direct potentiometry with a copper-ion-selective electrode. The analytical procedure based on ultrafiltration is a good alternative to determine the complexation parameters in natural organic material from aquatic and soil systems. This approach presents additional advantages such as better sensibility, applicability for multi-element capability, and its possible to be used under natural conditions when compared with the traditional ion-selective electrode.
Descrição
Palavras-chave
complexation parameters, copper, organic matter, humic substances, ultrafiltration, ion-selective electrode
Como citar
Analytical and Bioanalytical Chemistry. Berlin: Springer-verlag Berlin, v. 375, n. 8, p. 1097-1100, 2003.