CARACTERIZACIóN QUíMICA DE LA MATERIA ORGáNICA NATURAL DEL RíO PASTO

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.