Romao, LPCCastro, G. R.Rosa, A. H.Rocha, J. C.Padilha, P. M.Silva, H. C.2014-05-202014-05-202003-04-01Analytical and Bioanalytical Chemistry. Berlin: Springer-verlag Berlin, v. 375, n. 8, p. 1097-1100, 2003.1618-2642http://hdl.handle.net/11449/37012In 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.1097-1100engcomplexation parameterscopperorganic matterhumic substancesultrafiltrationion-selective electrodeArtigo10.1007/s00216-002-1728-6WOS:000183199000020Acesso restrito69814486374563910000-0002-2042-018X