Análise exploratória rápida e não destrutiva (screening) da presença de elementos químicos tóxicos em material escolar por fluorescência de raios x

Química Nova

José Augusto Da-col¹  Rafael Ortiz Sanchez¹  Juliana Terra¹  Maria Izabel Maretti Silveira Bueno¹ 

[1] ,Universidade Estadual de Campinas Instituto de Química Campinas SP ,Brasil

关键词: school supplies;    screening;    X-ray fluorescence;   

DOI  :  10.1590/S0100-40422013000600023

来源: SciELO

【 摘 要 】

Compulsory in Brazil, toy certification aims to prevent possible risks in toy use. The Brazilian National Institute of Metrology (INMETRO) establishes the maximum concentration of toxic elements (TE) that may be present in toys. This study evaluates the presence of TE in different crayons, gouache and modeling clays using X-ray fluorescence. This technique is fast, has low operating cost and minimum sample pretreatment, resulting in a clean procedure without reagent consumption and waste generation. Bromine (in gouache) and Barium (in crayons) were the only potentially TE identified in the samples studied.

【 授权许可】

CC BY-NC   
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