ROSERO MOREANO, Milton; NERIN DE LA PUERTA, Cristina; TABORDA OCAMPO, Gonzalo    RODRIGUEZ MARTINEZ, Gloria. CARACTERIZACIÓN QUÍMICA DE LA MATERIA ORGÁNICA NATURAL DEL RÍO PASTO. []. , 35, 136, pp.363-369. ISSN 0370-3908.

This work shows the more relevant issue related with the first chemical caracterization of natural organic matter of Pasto River. Modern instrumental analysis techniques such as Thermochemolysis-GC-MS; Field flow fractionation chromatography and Inductively coupled plasma mass spectrometry ICP-MS were necessary. The results showed that the main composition of this matter were organic compounds such as carboxylic acids, aromatic compounds with molecular mass around 5 kDa The presence of iron and chromium ions are signs of a possible contribution of pyrite-rich volcanic soils of the area and some effluent discharged without control of the small artesanal leather industry respectively.

: NOM; thermochemolysis-GC-MS; field flow fractionation; Pastoás river.

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