Interactions of Pb2+ with fulvic acid by electrophoretically mediated on-capillary microanalysis

Electrophoretically mediated microanalysis (EMMA) was used to monitor the on-column complexation of Pb2+ and fulvic acid (FA). Electropherograms revealed several characteristic regions, the areas of which correlate with the metal concentration. The analysis of the electropherograms suggests that at least two different complexes are formed. Therefore, the EMMA is a prospective technique for structural investigation of humic substances (HS).