Estudio del contenido de metales biodisponibles en variedadesde melloco (Ullucus tuberosus), mediante absorción atómica de llama y horno de grafito

Abstract

Ecuador is a mega biodiverse country with a high environmental impact due to volcanic eruptions that affect water, air and soil, thus damaging agriculture and livestock. In this study, the metal content in agricultural soils of the Pilahuín parish of the Ambato canton and in 5 varieties of melloco (Ullucus tuberosus) acquired in different markets of Ambato and Riobamba was evaluated. Total metals were estimated from a fraction of regal water and bioavailable metals by fraction with EDTA. The pH and electrical conductivity were determined at a ratio of 1: 2,5 p for v with distilled water and the organic matter lost for ignition. Potassium, magnesium, manganese, copper, iron and zinc were determined with the flame and cobalt atomizer, strontium, lead, nickel and cadmium with graphite furnace. In all cases certified monoelemental aqueous patterns were used to prepare the calibration curve daily. The content of the metals of the soluble fraction in regal water was found below the Environmental Quality norm of the Resource, Soil and Remediation Criteria for Contaminated Soils in Ecuador. In addition, of all the metals studied in melloco they were found below the norm, with the exception of lead in caramelito melloco where values 0,15 mg for kg were found.