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Título : Supercritical fluid extraction of corn germ oil: Study of the influence of process parameters on the extraction yield and oil quality
Autor : Rebolleda Alonso, Sara
Rubio Rodríguez, Nuria
Beltrán Calvo, Sagrario
Sanz Díez, Mª Teresa
González San José, Mª Luisa
Publicado en: The Journal of Supercritical Fluids. 2012, V. 72, p. 270–277
Editorial : Elsevier
Fecha de publicación : dic-2012
ISSN : 0896-8446
Resumen : 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.
Palabras clave: Supercritical fluid extraction
Corn germ oil
Tocopherol
Sovová’s model
URI : http://hdl.handle.net/10259/4338
Versión del editor: http://dx.doi.org/10.1016/j.supflu.2012.10.001
Aparece en las colecciones: Artículos BIOIND

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