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Determination of the oxidation stability of biodiesel and oils by spectrofluorimetry and multivariate calibration |
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| Authors: | Meira Marilena Quintella Cristina M Tanajura Alessandra Dos Santos da Silva Humbervânia Reis Gonçalves Fernando Jaques D'Erasmo Santos da Costa Neto Pedro R Pepe Iuri M Santos Mariana Andrade Nascimento Luciana Lordelo |
| Affiliation: | a LabLaser, Instituto de Química, Universidade Federal da Bahia, Av. Barão de Jeremoabo, s/n. Campus de Ondina, CEP 40.170-290, Salvador, BA, Brazil b LAPO, Instituto de Física, Universidade Federal da Bahia, Campus de Ondina, CEP 40.170-115, Salvador, BA, Brazil c Universidade Tecnológica Federal do Paraná, Campus Curitiba, Av. Sete de Setembro, 3165 Rebouças, CEP 80230-910, Curitiba, PR, Brazil |
| Abstract: | Oxidation stability is an important quality parameter for biodiesel. In general, the methods used to evaluate the oxidation stability of oils and biodiesels are time-consuming. This work reports the use of spectrofluorimetry, a fast analytical technique, associated with multivariate data analysis as a powerful analytical tool to prediction of the oxidation stability. The prediction of the oxidation stability showed a good agreement with the results obtained by the EN14112 reference method Rancimat. The models presented high correlation (0.99276 and 0.97951) between real and predicted values. The R2 values of 0.98557 and 0.95943 indicated the accuracy of the models to predict the oxidation stability of soy oil and soy biodiesel, respectively. The residual distribution does not follow a trend with respect to the predicted variables indicating the good quality of the fits. |
| Keywords: | Biodiesel Vegetable oil Oxidation Spectrofluorimetry Multivariate calibration |
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