Determinação de metais em óleos lubrificantes, provenientes de motores de ônibus urbano, utilizando a FAAS

• Autor(a) principal: Silveira,Eva Lúcia Cardoso
• Data de Publicação: 2010
• Outros Autores: Coelho,Ronaldo Cunha, Moita Neto,José Machado, Moura,Carla Verônica Rodarte de, Moura,Edmilson Miranda de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Química Nova (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000900008
• topic: used lubricating oil; metals; flame atomic absorption spectrometry

This work proposed a procedure to examine ashes produced in burning lubricating oils used in public transportation, in Teresina PI. Sulphanilic acid was added to the oil samples, which were burned at 550 °C for three hours and 650 °C for two hours. The ash solutions were analyzed by FAAS and there were significant differences in the metal contents of the waste oil produced from normal car service. The quantification limits in μg g-1 were 5.9 (Fe), 4.4 (Pb), 1.7 (Ni), 2.1 (Cu), and 1.2 (Zn). The results showed positive accuracy and precision with recoveries between 88 and 108%, and RSD lower than 10%.