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Physicochemical properties and bioactive compounds of selected seed oils.

Nyam, Kar Lin and Tan, Chin Ping and Lai, Oi Ming and Long, Kamariah and Che Man, Yaakob (2009) Physicochemical properties and bioactive compounds of selected seed oils. Food Science and Technology, 42 (8). pp. 1396-1403. ISSN 0023-6438

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The physicochemical properties and chemical composition of oil extracted from five varieties of plant seeds (bittermelon, Kalahari melon, kenaf, pumpkin and roselle seeds) were examined by established methods. The thermal properties of extracted oils by differential scanning calorimetry were also evaluated. Sensorial profiles of these seed oils were defined through the CieLab (L*, a*, b*) colour. Most of the quality indices and fatty acid compositions showed significant (P < 0.05) variations among the extracted oils. Physicochemical properties of the oils extracted were iodine value, 86.0–125.0 g I2/100 g oil; saponification value, 171.0–190.7 mg of KOH/g of oil; acid value, 1.1–12.9 mg of KOH/g of oil, free fatty acid, 0.6–6.5 g/100 g of oil, and peroxide value 1.5–6.5 meq of O2/kg of oil. Palmitic, oleic and linoleic acids were the major fatty acids in all of the extracted seed oils except for bittermelon, where eleostearic acid was the major fatty acid. Gallic, protocatechuic, p-hydroxybenzoic, vanillic, caffeic, syringic, pcoumaric and ferulic acids were identified in the extracted plant oils. Among these, vanillic acid was predominant in all extracted oils. The oils were rich in tocopherols with g-tocopherol as the major components in all oil samples. Among the phytosterols, sitosterol was the major phytosterol extracted from the five plant seed oils. The seeds of these plants contain a great number of valuable minor compounds, which have a potential high value as food and for production of non-food products.

Item Type:Article
Keyword:Oil, Oilseeds, Physicochemical, Chemical composition, Thermal properties
Faculty or Institute:Faculty of Food Science and Technology
DOI Number:10.1016/j.lwt.2009.03.006
ID Code:7740
Deposited By: Samsida Samsudin
Deposited On:19 Aug 2010 12:04
Last Modified:18 Dec 2015 15:47

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