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 Inter-varietal variation in the composition of Okra (Hibiscus esculentus L.) seed oil
Author(s)
Farooq Anwar Department of Chemistry & Biochemistry, University of Agriculture, Faisalabad, PAKISTAN
Tahira Iqbal Department of Chemistry & Biochemistry, University of Agriculture, Faisalabad, PAKISTAN
Zahid Mahmood Department of Chemistry & Biochemistry, University of Agriculture, Faisalabad, PAKISTAN
Umer Rashid Department of Industrial Chemistry, Government College University, Faisalabad, PAKISTAN
Tufail H. Sherazi National centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, PAKISTAN
Abstract
The seeds from two varieties namely Sabz Pari and Punjab-8 of Okra (Hibiscus esculentus), grown under similar environment, exhibited oil content 11.72 and 13.42%, respectively. Protein, fiber, moisture and ash contents were found to be 20.00, 29.60, 7.26 and 5.18 and 23.68, 27.41, 8.35 and 6.23, respectively. The physicochemical characteristics of the extracted oils were as follows: iodine value, 111.6-1 14.9; refractive index (40°C), 1.4620-1 .4640; density (24°C), 0.904-0.908 gcm-3, saponification value, 180.3-1 85.8 (mg of KOH g-1  of oil); unsaponifiable matter, 0.61-0.65%; color (1-in. cell), 3.40-7.00 R + 34.00-70.00 Y; acid value, 3.49-4.67 (mg of KOH g-1  of oil); peroxide value, 7.29-8.47 meq kg-1 . Tocopherols (α, γ and δ) contents of the oils accounted for 653.0-696.5, 2.13-3.33 and 1.01-1 .11 mg kg-1 , respectively. The major fatty acids of the tested oils were: linoleic acid (29.90-31.70%), palmitic acid (29.50-31.20%), oleic acid (26.69- 28.19%) and stearic acid (4.90-6.10%). A small amount of cylcopropaneoctanoic acid with contribution up to 2.0% was also established. Most of the studied parameters of Sabz Pari and Punjab-8 H.esculentus seed oils were quite comparable with those of typical Hibiscus seed oils reported in the literature.
Publication Details
Page(s) 271-280
DOI DOI not available
Published Journal: Pakistan Journal of Botany, Volume: 43, Issue: 1, Year: 2011
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