Análise de metais em materiais escolares

Abstract

School supplies are intended for all ages because of their importance in play activities, but what is most worrisome is when children misuse it, bring in contact with their mouth and eventually ingest parts. M etals are part of the constitution of materials and can cause problems for human health, depending on the amount that is exposed daily due to the bioaccumulation process, which is the body's ability to absorb and retain harmful substances to living beings, causing damage over the years. as your concentration increases, where its main negative effects affect the nervous system. In the project was studied the presence of 4 metals: aluminum, cadmium, lead and chromium, using the Atomic Absorption Spectrometry (EAA) technique. The results obtained were compared with the values allowed by the current resolution and, in case of higher concentration values that exceed those allowed by INMETRO, the reevaluation of these products is necessary, since further measures should be taken if there is a possibility of harm to health. human the metals analyzed, only Aluminum presented in all materials a high amount ranging from 129.72 mg / kg to 26.390,00 mg / kg, among the other elements lead was not detected, cadmium about 60% of the materials was not detected. the presence and other 40% range from 0.02 mg / kg to 3.61 mg / kg, and chromium was found in all materials with values ranging from 1.25 mg / kg to 8.57 mg / kg.