Determinación de plomo y cadmio por espectroscopia de absorción atómica con horno de grafito, para la evaluación de la calidad del agua en afluentes cercanos al volcán Cotopaxi.

Abstract

In the present work, the water quality of two important effluents of the Cotopaxi volcano, the Pita and Cutuchi rivers, was studied. The study was objectively framed in the determination of lead and cadmium by atomic absorption spectroscopy with graphite furnace; as well as copper and zinc by atomic absorption spectroscopy with flame, the two techniques were developed in the LASA Laboratory in Quito-Ecuador. In each of the rivers, three sampling points were established. Samples were taken at two different times in 2017. In addition, field data such as pH, temperature and conductivity were taken to further contribute to the baseline. The water from the Pita and Cutuchi rivers do not comply with the TULSMA regulations Table 2 in the parameters Pb, Zn and Cu respectively. No significant differences were found between the two seasons of the year according to the ANOVA analysis (p> 0.05), however in June both the lead and the cadmium tend to concentrate slightly in both rivers. Zinc and copper remain stable at both times.