Resumen

DOMINGUEZ V, José Ramón; VARELA E, Ana María  y  DURAN, José Alvarado. Modelling Clay´s Toxicity as a function of its Cd, Cr, Pb, Ti, V, Fe and Mn content: Possible risk of its use in Pre-school education. Revista de Investigación [online]. 2010, vol.34, n.71, pp.237-247. ISSN 1010-2914.

Clay is a sinthetic material used by children in pre-school education. Clay colors are primarily due to the use of metallic oxides during its manufacturing process. Therefore, some toxic metals such as Cd, Cr, Fe, Mg, Pb, Ti and V could be found as components of clay. In this work, we describe the analysis of two clay samples, A and B, by means of atomic absorption spectrometry using flame or graphite furnace as atomizers, in order to determine their content of the metals mentioned above. Samples A and B were digested following the methodology proposed in the CEM model MDS-81D microwave oven manual for digestion of samples of similar structure to clay. Results showed that metal concentrations in the two clay samples analyzed are within the limits allowed according to the corresponding regulations

Palabras clave : Toxicity; preschool education; clay; Analysis; Metals.