FTIR characterization and physicochemical evaluation of cottonseed oil

Physiochemical characteristics of seed and oils varied as: weight of individual seed (0.069-0.085 g), weight of 100 seeds (5.95-7.73 g), width (0.461-0.544 cm), length (0.736-0.915 cm), moisture (6.2-8.5%), oil content (12.01 to14.55%), refractive index at 40°C (1.4661-1.4665) iodine value (IV) (93.90-105.76 gb/100g), saponification value (SV) (181.83-190.55 mgKOH/g), peroxide value (PV) (1.0-6.0 mEq/Kg), free fatty acids (FFA) (17.30-38.80 %) and induction period (IP) (1.95 -2.65 h), respectively. Analysis showed that most abundant fatty acid in each variety was linoleic acid (42.09-52.55 %) among unsaturated fatty acids, whereas palmitic acid (22.70-26.20 %) was major saturated fatty acid. [...]significant variation in physiochemical properties was observed among five cottonseed varieties, especially FFA and IP of cottonseed oil which is not good for the quality and edible point of view. After soybean, cotton is assumed as one of the most excellent source of plant (vegetable) protein and the fifth major seed oil crop after sunflower, canola, palm and soybean [3]. The quality of vegetable oils, especially the fatty acids profile and physicochemical properties are an imperative feature in determining the market value and commercial uses [6]. The aim of this study was to check the variations in the physiochemical properties of selected cottonseed varieties (RH-112, Lankart-57, K-25, F-20 and D-9) collected from Seed Unit, Institute for Agricultural Research, Tandojam, Pakistan and Fourier transform infrared characterization of cottonseed oil. Physical parameters Some physical characteristics of cottonseed and oil of different varieties were analyzed such as individual seed weight, weight of 100 seeds, thickness, length, moisture and...