title: Determination of the oxidation stability of biodiesel and oils by spectrofluorimetry and multivariate calibration.
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 R(2) 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.
authors.affiliation: LabLaser, Instituto de Química, Universidade Federal da Bahia, Av. Barão de Jeremoabo, s/n. Campus de Ondina, CEP 40.170-290, Salvador, BA, Brazil. marimeir@ufba.br
authors.forename: Marilena
authors.initials: M
authors.lastname: Meira
authors.forename: Cristina M
authors.initials: CM
authors.lastname: Quintella
authors.forename: Alessandra Dos Santos
authors.initials: Ados S
authors.lastname: Tanajura
authors.forename: Humbervânia Reis Gonçalves
authors.initials: HR
authors.lastname: da Silva
authors.forename: Jaques D'Erasmo Santos
authors.initials: JD
authors.lastname: Fernando
authors.forename: Pedro R
authors.initials: PR
authors.lastname: da Costa Neto
authors.forename: Iuri M
authors.initials: IM
authors.lastname: Pepe
authors.forename: Mariana Andrade
authors.initials: MA
authors.lastname: Santos
authors.forename: Luciana Lordelo
authors.initials: LL
authors.lastname: Nascimento
mesh_terms: D056804:Biofuels / Q000032:analysis*; D002138:Calibration; D015999:Multivariate Analysis; D009821:Oils / Q000032:analysis* / Q000737:chemistry; D010084:Oxidation-Reduction; D011786:Quality Control; D013024:Soybean Oil; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D056804:Biofuels; D009821:Oils; D013024:Soybean Oil