Determinação espectrofotométrica do teor de biodiesel metílico em misturas com óleo diesel

• Ano de defesa: 2009
• Autor(a) principal: SILVA, Marcos Alexandro Abreu e
• Orientador(a): ANTONIOSI FILHO, Nelson Roberto
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Mestrado em Química
• Departamento: Educação em Química
• País: BR
• Palavras-chave em Português: mistura BX; espectroscopia de UV-vís; controle de qualidade; 1.Biodiesel 2.Controle de Qualidade 3.Espectroscopia de UV-vís
• Palavras-chave em Inglês: Mix BX; UV-Vis spectroscopy; quality control
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tde/1038

In this work it was developed a quantitative analytical methodology to determine the content of methyl biodiesel in diesel fuel through the fatty acid methyl ester reaction with the hydroxylamine hydrochloride in alkaline solutions, which they were acidified and converted to hydroxamic acids, followed by treatment with ferric ion to give the colored ferric hydroxamate complex, and afterwards extract in n-heptane and were analysed by UV-visible spectroscopy. It was made the optimization of the variables that interfere in the reaction, and parameters such as accuracy, precision and the limit of detection (LOD) among other parameters to assess the quality of the method developed it was also evaluated. The results indicated that the method has shown an excellent linearity in small intervals of biodiesel blend levels, an excellent determination coefficient of the calibration curve (R2 > 0.99) at a wide range of wavelength (420-440 nm). As well as it has also shown to be applied in a wide range of methyl biodiesel blend levels in diesel fuel (B1 to B20), and it is suitable to be used in the quality control procedures for the production of BX blends.