Effects of Extraction Method on the Thermal Oxidative Stability of Seed Oils from Camellia sinensis L.

녹차 종실유의 제조법에 따른 열산화 안정성 비교

  • Kim, Mi-Sun (Department of Food and Nutrition, Dongduk Women's University) ;
  • Lee, Jae-Hwan (Department of Food and Science and Technology, Seoul National University of Science and Technology) ;
  • Kim, Myong-Ae (Department of Food and Nutrition, Dongduk Women's University)
  • 김미선 (동덕여자대학교 식품영양학과) ;
  • 이재환 (서울과학기술대학교 식품공학과) ;
  • 김명애 (동덕여자대학교 식품영양학과)
  • Received : 2010.07.20
  • Accepted : 2010.12.17
  • Published : 2010.12.31

Abstract

Camellia sinensis L. (green tea) seed oils were prepared by roasting at $213^{\circ}C$ and pressing (RP), pressing (P), and nhexane extraction (H). The physico-chemical properties of the RP, P, and H samples, including fatty acid composition, color, and sensory characteristics were analyzed. RP, P and H samples were thermally oxidized at $180^{\circ}C$, and oxidative stability was determined by DPPH, CDA, and p-AV at 0, 20, 40, 60, and 80 min. Compared to the P and H samples, RP resulted in significantly higher thermal oxidative stability according to the DPPH, CDA, and p-AV results (p<0.05). The ratio of unsaturated fatty acids to saturated fatty acids among RP, P, and H samples were significantly different (p<0.05). The oleic acid and linoleic acid contents in green tea seed oils were 58 and 23%, respectively. Hunter's color value of lightness (L) for the RP, P, and H samples was not significant. Redness (a) of RP was $3.47{\pm}0.119$ and yellowness (b) of H was $60.10{\pm}2.483$, which were significantly different. Compared to RP samples, H and P samples had the highest color and off-odor values in the sensory evaluation. RP samples showed the highest taste value and were significant overall (p<0.05). The thermal stability of RP extraction was more stable than any other method. Camellia sinensis L. seed oil extracted by RP had better sensory characteristics than other edible oils, including soybean oil, grape seed oil, and extra virgin olive oil.

References

  1. AOAC. 1995. Official Methods of Analysis. 16th ed. Association of official analytical chemists. Washington, DC, USA
  2. AOAC. 2000. Official Method of Analysis of AOAC Intl. 17th ed. Association of Official Analytical Communities, Gaithersburg, MD, USA. Method 969.33
  3. AOCS. 1980. Official and Tentative Methods of the AOCS. 3rd ed. American Oil Chemists' Society Press, Champaign, IL, USA. Method Cd pp 18-90
  4. AOCS. 1990. Official and tentative Methods of the AOCS. 4th ed. American Oil Chemists' Society Press, Champaign, IL, USA. Method Ti la-64
  5. Beltran E, Pla R, Yuste J, MoroMur M. 2003. Lipid oxidation of pressurized and cooked chicken: role of sodium chloride and mechanical processing on TBARS and hexanal values. Meat Science, 64(1):19-25 https://doi.org/10.1016/S0309-1740(02)00132-8
  6. Duke JA. 1985. Handbook of medicinal herbs. CRC Press. Inc. Boca Raton, Florida
  7. Frankel EN. 1985. Chemistry of autooxidation: Mechanism, products and flavor significance. In: Flavor Chemistry of Fats and Oil. Min DB, Smouse TH (eds). AOCS Press, Champaign, IL, USA. pp 1-37
  8. Jelen HH, Obuchowska M, Zawirska-Wojtasiak R, Wascowiz E. 2000. Headspace solid-phase microextraction use for the characterization of volatile compounds in vegetable oils of different sensory quality. J. Agr. Food Chemistry, 48(6):2360-2367 https://doi.org/10.1021/jf991095v
  9. Juntachote T, Berghofer E, Siebenjandl S, Bauer F. 2006. The antioxidative properties of Holly basil and Galangal in cooked ground port. Meat Science, 72(3):446-456 https://doi.org/10.1016/j.meatsci.2005.08.009
  10. Kim MS. 2009. Effect of extraction methods on the thermal oxidative stability of seed oils from Carmellia sinensis L. Master degree thesis, Dongduk women's university. pp 20- 21
  11. Lee JM, Chang PS, Lee JH. 2007. Comparison of Oxidative stability for the Thermally-oxidized Vegetable Oils using a DPPH Method. Korean J. Food sci. Technol., 39(2):133-137
  12. Liu XG, Xia HY. 1997. Analysis of amino acids in fruit and cessing by-products of Camellia oleifera. Chem. Ind. Forest Products, 17(1):51-55
  13. Min DB. 1998. Lipid oxidation of edible oil. In:Food Lipids. Akoh K, Min TH (eds). Marcel Dekker, New York, NY, USA. pp 283-296
  14. Minoru T, Sumito Y, Kanoko Y, Hajime O, Tadaxhi YG, Katsunori K, Jan AB. 2000. Theasaponin E1 destroys the salt tolerance of yeasts. J. Biosci. Bioeng., 90(6):637-642 https://doi.org/10.1263/jbb.90.637
  15. Nawar WW. 1998. Lipid In: Food Chemistry. Fennema OR (ed). Marcel Dekker. New York, NY, USA. pp 225-320
  16. Noh WS, Park JS. 1992. Lipid composition of Korean safflower seeds. J. Korean Agric. Chem. Soc., 35(2):110-114
  17. Rah HH, Baik SO, Han SB, Bock JY. 1992. Chemical compositions of the seed of Korean green tea plant (Camellia sinensis L.) J. Korean Agric. Chem. Soc., 35(4):272-275
  18. Rehman ZU, Habib F, Shah WH. 2004. Utilization of potato peels extract as a natural antioxidant in soy bean oil. Food Chem., 85(2):215-220 https://doi.org/10.1016/j.foodchem.2003.06.015
  19. Sur P, Chaudhuri T, Vedasiromoni JR, Gomes A, Ganguly DK. 1998. Antiinflammatory and antiooxidant property of saponins of tea (Camellia sinensis (L.) O. Kuntze) root extract. Phytother. Res., 12(3):174-176
  20. Weng Y. 1997. Studies of Camelia grijsii Hance. Commonwealth Forestry Review, 76(2):132-133
  21. Wu KY, Weng YX, Fei XQ, Yang WQ, Sun XZ. 1998. Comparison of antisenile effects of seed oil of Camellia grijsii and certain other oil from woody crops on 2BS cell culture. Forest Res., 11(4):355-360
  22. Xia LF, Zhang AL, Xiao TJ. 1993. An introduction to the utilization of camellia oil in China. American Camellia Yearbook. pp 12-15
  23. Yang JK, Gang BK, Kim JM, Park YG, Choi MS. 2000. Physicochemical properties and composition of fatty acids from seed oil of Camellia sinensis L. J. Korean Tea Soc., 6(3):83-91