Effects of storage and industrial oilseed extraction methods on the quality and stability characteristics of crude sunflower oil (Helianthus annuus L.)
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Dosyalar
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Consejo Superior Investigaciones Cientificas-Csic
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The influence of industrial oilseed extraction methods on the quality and stability of crude sunflower oil (pre-pressed, solvent-extracted, full-pressed and mixed oils) was studied by means of the determination of free fatty acids, peroxide value, color value, iron, phosphorus, total and individual tocopherol contents, their stability against oxidation (Rancimat induction time) and the fatty acid composition with special emphasis on trans fatty acids. In addition, these crude oils were stored for a period of four months at 40 +/- 2 degrees C and analyzed at monthly intervals for free fatty acids, peroxide value, and Rancimat induction time to evaluate their storage stability. The results revealed that the crude sunflower oils obtained by the full-pressed extraction method had worse quality and stability parameters than the crude oils obtained by other extraction methods. Tocopherol content showed a drastic decrease with full-pressed extraction. Also, the crude sunflower oils obtained by the full-pressed extraction presented a higher total trans fatty acid content than the others. On the contrary, the solvent extraction method influenced the phosphorus and iron contents more than the others. The results indicated, however, that pre-pressing the oil appeared to be better than other methods. This study suggests that it is absolutely necessary for the vegetable oil industry to reevaluate the full pressing method as well as the solvent extraction conditions used for sunflowerseeds in order to retain both nutritive value and oxidative stability.
Açıklama
Anahtar Kelimeler
Crude sunflower oil, Extraction, Stability, Storage, Tocopherols, Trans fatty acid, Fatty-Acid-Composition, Oxidative Stability, Vegetable-Oils, Solvent-Extraction, Tocopherol Content, Edible Rapeseed, Different Steps, Pretreatment, Rancimat, Seeds
Kaynak
Grasas Y Aceites
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
62
Sayı
4
