Abstract
One of the main concerns about the use of edible vegetable oils in food industry frying processes is the oxidative degradation due to the high temperatures, presence of oxygen, ultraviolet radiation, and the presence of metal ions. The main compounds formed during oxidative reactions include aldehydes, ketones, alcohols, and carboxylic acids, being some of these electroactive compounds, which can be used with quantification purposes. In this work, cyclic voltammetry and a flow method based on headspace sampling with amperometric detection were performed, followed by principal component and cluster analysis to classify palm olein, soya bean, and sunflower oil samples according to their degradation state. The electrochemical techniques were based on the use of 1-butyl-3-methylimidazolium hexafluorophosphate as conductive media. The amperometric profile information provided a clearer classification than the voltammetric profile. Additionally, the amperometric results were applied to determine iodine value and aldehyde content by means of a partial least square regression. The values obtained were statistically similar than the estimated using 1H nuclear magnetic resonance spectroscopy and HPLC. The combination of electrochemical techniques and chemometric analysis offers valuable information for classification and quantification purposes.
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The authors thank the financial support from Consejo Nacional de Ciencia y Tecnología (CONACyT) (SNI distinction as research membership and scholarship).
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Conceptualization, E.M.S. and J.A.R.; methodology, S.R. and J.A.T.; formal analysis, C.A.G.; writing, review, and editing, S.R. and J.A.R.
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Sandra Ramírez-Montes declares that she has no conflict of interest. Eva M. Santos declares that she has no conflict of interest. Carlos A. Galan-Vidal declares that he has no conflict of interest. J. Andrés Tavizón-Pozos declares that he has no conflict of interest. Jose A. Rodriguez declares that he has no conflict of interest.
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Ramirez-Montes, S., Santos, E.M., Galan-Vidal, C.A. et al. Classification of Edible Vegetable Oil Degradation Using Multivariate Data Analysis From Electrochemical Techniques. Food Anal. Methods 14, 2597–2606 (2021). https://doi.org/10.1007/s12161-021-02083-4
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DOI: https://doi.org/10.1007/s12161-021-02083-4