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. Shimamoto¹  Maria Izabel M. S. Bueno¹  Luis F. R. de Lima¹  Nathassia D. de Abreu¹  Bianca Kazitoris¹  Vitor T. Salvador¹  Eustáquio V. R. de Castro²  Elói A. S. Filho²  Wanderson Romão² 

[1] Universidade Estadual de Campinas;Universidade Federal do Espírito Santo;

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

DOI  :  10.1590/S0100-40422011000800017

来源: DOAJ

【 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】

Unknown