Resumo

CEPPI, S.B.; VELASCO, M.I.; FETSCH, D.  e  HAVEL, J.. FINGERPRINTS OF HUMIC ACIDS BY CAPILLARY ZONE ELECTROPHORESIS. Bol. Soc. Chil. Quím. [online]. 1999, vol.44, n.4, pp.401-411. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16441999000400002.

Humic substances (HS) have a great importance in regard to the quality and productivity of a soil, and in the retention of the metal ions and pollutants by the environment. The characterization of humic compounds provides important information to evaluate the interaction of HS metal ions and with different classes of organic compounds (e.g., herbicides and pesticides). In order to understand HS behavior, it is necessary to separate this complex organic matter into fractions, and determine the structure of each compound in the fractions obtained. Numerous studies applying many different analytical techniques have been used for this purpose. In particular, the application of capillary zone electrophoresis (CZE) for the characterization of HS has evoked an increased interest. The aim of this work is to study the CZE behavior of HA from a different origin. The HA of Argentinean soils and also the HA from compost of urban wastes will be studied and compared to the reference and standard samples of the international Humic Substances Society (IHSS) in DL-alanine as background electrolyte (BGE). The IHSS HA has electropherograms similar to those of Argentinean HA. Additionally, a CZE method developed here can be used to follow the maturation process in the composting of urban wastes

Palavras-chave : Humic substances; capillary zone electrophoresis; fingerprints; separation.