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Characteristics and Composition of Watermelon Seed Oil and Solvent Extraction Parameters Effects


Watermelon seed oil characteristics were evaluated to determine whether this oil could be exploited as an edible oil. Hexane extraction of watermelon seeds produced yields of 50% (w/w) oil. The refractive index, saponification and iodine value were 1.4712 (at 25 °C), 200 mg KOH/g and 156 g I/100 g, respectively. The acid and peroxide values were 2.4 mg KOH/g and 3.24 mequiv/kg, respectively. The induction time of the oil was also 5.14 h at 110 °C, which was measured for the first time. Total unsaturation contents of the oil was 81.6%, with linoleic acid (18:2) being the dominant fatty acid (68.3%). Considering that the watermelon seed oil was highly unsaturated, the relatively high induction time might indicate the presence of natural antioxidants. In addition, the influence of extraction parameters on extraction of oil from watermelon seed with hexane as a solvent was studied at several temperatures (40, 50, and 60 °C), times (1, 2, and 3 h) and solvent/kernel ratios (1:1, 2:1, and 3:1). The oil yield was primarily affected by the solvent/kernel ratio and then time and temperature, respectively. The protein content of the oil-free residue was 47%.

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  1. Mabaleha MB, Mitei YC, Yeboah SO (2007) A comparative study of the properties of selected melon seed oils as potential candidates for development into commercial edible vegetable oils. J Amer Oil Chem Soc 84:31–36

    Article  CAS  Google Scholar 

  2. Bawa AS, Bains GS (1977) Integrated processing of watermelons for juice and seed. Indian Food Packer 31:12

    Google Scholar 

  3. Hasan F (1993) Research on the possibility of using watermelon juice in fruit juice cocktails. Gida 18:369–371

    Google Scholar 

  4. Oyenga VA, Fetuga BL (1975) Some aspects of the biochemistry and nutritive value of the watermelon seed (Citrullus Vulgaris Schrad). J Sci Food Agric 2:843–846

    Article  Google Scholar 

  5. Teotia MS, Ramakrishna P (1984) Chemistry and technology of melon seeds. J Food Sci Technol 21:332–340

    CAS  Google Scholar 

  6. Kamel BS, Dawson H, Kakuda Y (1985) Characteristics and composition of melon and grape seed oils and cakes. J Am Oil Chem Soc 62:881–883

    Article  CAS  Google Scholar 

  7. El-Adawy TA, Taha KM (2001) Characteristics and composition of different seed oils and flours. Food Chem 74:47–54

    Article  CAS  Google Scholar 

  8. Akoh CC, Nwosu CV (1992) Fatty acid composition of melon seed oil lipids and phospholipids. J Am Oil Chem Soc 69:314–316

    Article  CAS  Google Scholar 

  9. Helrich K (1990) Official methods of analysis of the Association of Official Analytical Chemists, 15th edn. Virginia, USA

    Google Scholar 

  10. Link WE (1973) Official and tentative methods of the American Oil Chemists’ Society, 3rd edn. AOCS Press, Champaign

    Google Scholar 

  11. Frank J, Geil JV, Freaso R (1982) Automatic determination of oxidation stability of oil and fatty products. Food Technol 146:71–76

    Google Scholar 

  12. Ross PJ (1988) Taguchi techniques for quality engineering. International editions. McGraw-Hill, New York

    Google Scholar 

  13. Li H, Chen B, Zhang Z, Yao S (2004) Focused microwave-assisted solvent extraction and hplc determination of effective constituents in Eucommia ulmodies Oliv. Talanta 63:659–665

    Article  CAS  Google Scholar 

  14. Lidefelt J (2007) Handbook vegetable oils and fats, 2nd edn. AAK Press, Sweden

    Google Scholar 

  15. Gustone FD (2002) Vegetable oils in food technology: composition, properties, and uses. Blackwell, Oxford

    Google Scholar 

  16. Simic M, Karel M (1980) Autoxidation in food and biological systems. Plenum Press, New York

    Google Scholar 

  17. Farhoosh R (2007) The effect of operational parameters of the rancimat method on the determination of the oxidative stability measures and shelf-life prediction of soybean oil. J Am Oil Chem Soc 84:205–209

    Article  CAS  Google Scholar 

  18. Anwara F, Bhanger MI, Kazi TG (2003) Relationship between rancimat and active oxygen method values at varying temperatures for several oils and fats. J Am Oil Chem Soc 80:151–155

    Article  Google Scholar 

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Correspondence to Zahra Moaddabdoost Baboli.

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Moaddabdoost Baboli, Z., Safe Kordi, A.A. Characteristics and Composition of Watermelon Seed Oil and Solvent Extraction Parameters Effects. J Am Oil Chem Soc 87, 667–671 (2010).

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  • Watermelon seed
  • Solvent extraction
  • Oil characteristics
  • Fatty acids
  • Taguchi