Quantificação de antimônio em garrafas de politereftalato de etileno (PET) brasileiras por fluorescência de raios-X e avaliação quimiométrica para verificar a presença de pet reciclado através do teor de ferro

Química Nova

Gustavo G. Shimamoto²  Bianca Kazitoris²  Luis F. R. De Lima²  Nathassia D. De Abreu²  Vitor T. Salvador²  Maria Izabel M. S. Bueno²  Eustáquio V. R. De Castro¹  Elói A. S. Filho¹  Wanderson Romão¹ 

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

关键词: antimony;    PET bottles;    X-ray fluorescence;   

DOI  :  10.1590/S0100-40422011000800017

来源: SciELO

【 摘 要 】

Antimony is a common catalyst in the synthesis of polyethylene terephthalate used for food-grade bottles manufacturing. However, antimony residues in final products are transferred to juices, soft drinks or water. The literature reports mentions of toxicity associated to antimony. In this work, a green, fast and direct method to quantify antimony, sulfur, iron and copper, in PET bottles by X-ray fluorescence spectrometry is presented. 2.4 to 11 mg Sb kg-1 were found in 20 samples analyzed. The coupling of the multielemental technique to chemometric treatment provided also the possibility to classify PET samples between bottle-grade PET/recycled PET blends by Fe content.

【 授权许可】

CC BY-NC   
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