%0 Journal Article %T CARACTERIZACI¨®N QU¨ªMICA DE LA MATERIA ORG¨¢NICA NATURAL DEL R¨ªO PASTO %A Rosero Moreano %A Milton %A Ner¨ªn de la Puerta %A Cristina %A Taborda Ocampo %A Gonzalo %A Rodr¨ªguez Mart¨ªnez %A Gloria %J Revista de la Academia Colombiana de Ciencias Exactas, F¨ªsicas y Naturales %D 2011 %I Scientific Electronic Library Online %X 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. %K nom %K thermochemolysis-gc-ms %K field flow fractionation %K pasto¨¢s river. %U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0370-39082011000300009&lng=en&nrm=iso&tlng=en