Physicochemical properties and fatty acid composition of Juglans regia cultivars grown in Serbia |
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Authors: | B Rabrenovic K Picuric-Jovanovic S Sobajic |
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Institution: | (1) Department of Food Technology and Biochemistry, Faculty of Agriculture, 11000 Belgrade, Nemanjina 6, Serbia and Montenegro;(2) Department of Bromatology, Faculty of Pharmacy, 11000 Belgrade, 450 Vojvode Stepe, Serbia and Montenegro |
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Abstract: | Tree cultivars (Jupiter, Sejnov, and Elit) of walnut (Juglans regia L.) were collected during the 2004 harvest from Cacak, Central Serbia. The chemical composition, including moisture, total
oil content, crude protein, ash, and carbohydrates, was determined. Afterwards, two techniques of oil extraction were implemented:
cold pressing extraction and organic solvent extraction. Iodine value, saponification value, acid value, and peroxide value
of obtained walnut oils were analyzed. The fatty acid composition of the walnut oils was determined using gas chromatography
with flame ionization detector. The oleic acid content of the oils ranged from 15.9–23.7% of the total acids, while linoleic
acid content ranged from 57.2–65.1% and the linolenic acid from 9.1–13.6%. The process of oil extraction had no significant
effect on content and composition of fatty acids.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 118–120, March–April, 2008. |
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Keywords: | walnut oil cold pressing extraction solvent extraction physical and chemical constants fatty acid composition |
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