ASSESSING THE EFFECT OF PRESSING CONDITIONS IN EXPELLER PRESS ON QUALITY AND CHEMICAL COMPOSITION OF RAPESEED OIL
Journal Title: Żywność. Nauka. Technologia. Jakość - Year 2013, Vol 20, Issue 1
Abstract
The objective of this study was to determine the effect of pressing conditions in an UNO expeller press (manufactured by a ‘Farmet’ company) on the quality and chemical composition of pressed rapeseed oil. The research material included 2 batches of industrial rapeseed from the harvest campaigns in 2010 and 2011. Oils were pressed from rapeseed in the expeller machine (a screw-type press) with 3 different nozzles, their diameters being 6, 8, and 10 mm. Also, one batch of seeds was additionally heated (150 °C, 1 h) prior to pressing. The content of water and fat in the seeds and in rapeseed cake were determined as was the content of contaminations in the seeds. The extraction efficiency was computed. In the oils determined were the degree of hydrolysis, the primary and secondary lipid oxidation degree (acid value, peroxide value, and anisidine value; Totox index was computed]. Moreover, the colour of oils was determined as were the content of pheophytin a, the composition of fatty acids, and the oxidative stability according to the Rancimat test (120 °C).
Authors and Affiliations
Małgorzata Wroniak, Aleksandra Ptaszek, Katarzyna Ratusz
Keywords
Related Articles
- EP ID EP105182
- DOI http://dx.doi.org/10.151.93/zntj/2013/86/092-104
- Views 81
- Downloads 0
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