Abstract
Capillary electrophoresis (CE) has been used to study metal-humic substance (HS) interactions. The work was carried out with an aquatic fulvic acid (FA) as a representative HS. Two approaches were attempted for the complexation study. In the first approach, the metal complexation capability of FA by using CE for the determination of free metal cations (Sr 2+, Pb 2+, Cu 2+, Hg 2+ and Al 3+), was investigated. The second approach examined the electrophoretic behavior of the FA and its complexes with Hg 2+ and Fe 3+. Based on the obtained results, CE appears to be a promising tool for the characterization of metal-HS interactions.
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