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oai:riubu.ubu.es:10259/43382022-04-29T12:02:45Zcom_10259_5827com_10259_5086com_10259_2604com_10259_4244col_10259_5828col_10259_4245

2017-02-13T10:45:44Z urn:hdl:10259/4338 Supercritical fluid extraction of corn germ oil: Study of the influence of process parameters on the extraction yield and oil quality Rebolleda Alonso, Sara Rubio Rodríguez, Nuria Beltrán Calvo, Sagrario Sanz Díez, Mª Teresa González San José, Mª Luisa Supercritical fluid extraction Corn germ oil Tocopherol Sovová’s model The supercritical fluid extraction of corn germ oil has been studied in this work. Extractions were carried out at different pressure, temperature and flow rate to analyze the influence of these variables on the extraction kinetics and the oil quality obtained. Extraction curves are initially linear with a slope close to the oil solubility value in supercritical CO2. Based on these results a mathematical model was successfully applied to describe the extraction curves. Characterization of supercritical crude corn oil was performed by determining some physical parameters such as refraction index, density and color. Additionally, the fatty acid composition, neutral lipids, the content of tocopherols, acid index, peroxide value, antioxidant capacity and the oxidative stability were determined in the corn oil extracted. Fatty acid composition was compared with that for crude germ oil and no significant differences between the oils extracted by both methods were found. Oxidative stability test using the Rancimat showed that supercritical CO2 extracted corn oil is less protected against oxidation than n-hexane extracted oils. 2017-02-13T10:45:44Z 2017-02-13T10:45:44Z 2012-12 info:eu-repo/semantics/article 0896-8446 http://hdl.handle.net/10259/4338 eng The Journal of Supercritical Fluids. 2012, V. 72, p. 270–277 http://dx.doi.org/10.1016/j.supflu.2012.10.001 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 International Elsevier