Minor lipophilic components in crude rapeseed oil
1993
Pokorny, J. | Velisek, J. | Panek, J. | Kanova, J. (Vysoka Skola Chemickotechnologicka, Prague (Czech Republic). Ustav Chemie a Analyzy Potravin) | Parizkova, H. | Holasova, M. | Koplik, R. | Cmolik, J.
The contents of chlorophyll and carotenoid pigments, tocopherols, glucosinolate degradation products, and iron were determined in 47 samples of crude rapeseed oil, obtained in the following way: by expeller pressing and filtration, by expeller pressing and centrifuging, by solvent extraction, by mixing expeller pressed and solvent extracted oils (2:1 v/v). Solvent extracted oils were more stable against oxidation than expeller pressed oils. Positive correlation between the stability and the content of chlorophyll pigments was observed in all oils. The correlation between the tocopherol content and the stability was negative in filtered pressed oils and positive in mixed crude oils. Iron had no negative effect on the oxidative stability
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