Determinação da concentração micelar crítica de ácidos húmicos por medidas de condutividade e espectroscopia

Solange Leite de Moraes, Maria Olímpia Oliveira Rezende
2004 Química Nova  
Recebido em 22/7/03; aceito em 26/3/04; publicado na web em 27/7/04 DETERMINATION OF THE CRITICAL MICELLE CONCENTRATION OF HUMIC ACIDS BY SPECTROSCOPY AND CONDUCTIMETRIC MEASUREMENTS. The aim of this study was the determination of the critical micelle concentration (CMC) of the sodium dodecyl sulfate (SDS) surfactant using spectroscopic and conductimetric determinations and to compare these methodologies in the determination of the CMC of different humic acids (HA). The CMC obtained by
more » ... btained by conductimetric determination was satisfactory. By spectroscopic determination two values of the CMC were obtained for HA. These values can be to due the intra and intermolecular interactions in the HA structure.
doi:10.1590/s0100-40422004000500004 fatcat:2oj6es72qbfwjghanv2at73hla