Influence of impurities and hull content in material for pressing on sensory quality cold-pressed sunflower oil

• Published in: Acta Periodica Technologica Vol. 2010; no. 41; pp. 69 - 76
• Main Authors: Premovic, Tamara, Dimic, Etelka, Takaci, Aleksandar, Romanic, Ranko
• Format: Journal Article
• Language: English
• Published: Faculty of Technology, Novi Sad 2010
• Subjects: cold-pressed sunflower oil; hull; impurity; sensory qualities
• ISSN: 1450-7188; 2406-095X
• DOI: 10.2298/APT1041069P

This paper analyzes influence of different percentage of impurities and hull in the material for pressing on sensory quality (appearance, smell, taste, aroma and colour) of edible nonrefined sunflower oil. It has been concluded that simultaneous presence of impurities and hull in the starting material, especially presence of bigger quantities of impurities, has a rather negative effect on sensory quality of sunflower oil, made by cold pressing on a screw press. Apart from sensory analysis, the effect of impurities and hull on oil colour has also been identified by transparency determining, i.e. content of total pigments - carotenoids and chlorophyll. It has been concluded that presence of bigger quantities of impurities and hull cause the increase of content of both carotenoids and chlorophyll, and at the same time, decrease of transparency value in cold-pressed sunflower oil. U ovom radu je ispitan uticaj razlicitog udela necistoca i ljuske u materijalu za presovanje na senzorski kvalitet (izgled, miris, ukus, aromu i boju) jestivog nerafinisanog ulja suncokreta. Utvrdjeno je da istovremeno prisustvo necistoca i ljuske u polaznom materijalu, a narocito prisustvo vecih kolicina necistoca, veoma nepovoljno utice na senzorski kvalitet suncokretovog ulja, dobijenog postupkom hladnog presovanja na puznoj presi. Utvrdjeno je, takodje, da necistoca i ljuska uticu na povecanje sadrzaja kako karotenoida tako i hlorofila, a samim tim i na smanjenje vrednosti transparencije ulja.