Effect of Extraction Process on the Physicochemical Characteristics of Seed Oil of Camellia sinensis

추출 공정에 따른 Camellia sinensis 오일의 물리화학적 특성에 관한 연구

  • Kim, Youn-Soon (Department of Home economics Education, Chosun University) ;
  • Kim, Ran (Department of Cosmetics, Wonkwang Health Science University) ;
  • Na, Myung-Soon (Department of Total Beauty, Jeonnam Provinclal College) ;
  • Choi, DuBok (Department of Environmental Health, Cho-dang University)
  • 김연순 (조선대학교 사범대학 가정교육과) ;
  • 김란 (원광보건대학 미용피부관리과) ;
  • 나명순 (전남도립대학 토탈뷰티미용과) ;
  • 최두복 (초당대학교 이공대학 환경보건학과)
  • Received : 2009.10.20
  • Accepted : 2009.11.10
  • Published : 2010.04.10

Abstract

This study was carried out to investigate the effect of extraction methods on the physicochemical characteristics using seed oil of wild green tea (Camellia sinensis). When the solvent extraction method after grinding and steam treatment (SGS) was used for oil extraction, the yield was highest. The specific gravity was a range of $0.91{\sim}0.94g/cm^{3}$ irrespective of extraction methods of oil. However, the light in the solvent extraction method after grinding (SG), the red in the pressure extraction method after grinding and roasting treatment (PGR), and the yellow in SG method were highest. Among various fatty acids, the concentrations of C16 : 0, C18 : 1 and C18 : 2 were highest, irrespective of extraction methods. Especially, the C16 : 0 concentration was in the order of SG (34.78%), SGS (23.04%), and PRGS method (23.01%), the C18 : 1 concentration was in the order of PGR (43.35%), SGS (42.7%), SG method (39.0%), and in the case of C18 : 2, it was in order of PGR (23.15%), SGS (23.03%), and SG method (15.01%). The saturated fatty acid concentration was in the order of SG (40.59%), PGR (31.61%), and SGS method (30.1%). On the other hand, in the case of the unsaturated fatty acid, it was in the order of SGS (69.9%), PGR (68.39%), and SG method (59.41%). The acid values in the SGS and SG method after 10 days of storage were in the range of 6~8 mgKOH/g. However, in the case of PGR method, it was increased with the increase of storage time and was 49.3 mgKOH/g after 60 days. The peroxide values in the SGS and SG method were in the range of 60~100 mEq/g from 10 to 60 days of storage. On the other hand, when the storage time was increased from 10 to 30 days, it was sharply increased from 60 to 240 mEq/g. The rancidity was in the order of $Fe^{2+}$, $Cu^{2+}$, $Cr^{2+}$, $Zn^{2+}$ and $Ni^{2+}$, irrespective of extraction methods. Especially, when butylated hydroxyanisole (BHA) was added into oil containing 1.0 ppm of <$Fe^{2+}$, the peroxide value was decreased from 539.4 to 216.6%. These results show that seed oil of Camellia sinensis grown in Iksan can be applied as sources for cosmetics, detergents, food, and pharmaceuticals.

Acknowledgement

Supported by : 조선대학교

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