Determinação espectrofotométrica do teor de biodiesel metílico em misturas com óleo diesel
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Data
2009-11-25
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Universidade Federal de Goiás
Resumo
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.
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SILVA, Marcos Alexandro Abreu e. Spectrophotometric determination of methyl biodiesel content in blends with diesel. 2009. 79 f. Dissertação (Mestrado em Educação em Química) - Universidade Federal de Goiás, Goiânia, 2009.