Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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The Effect of Plant Ethanolic Extracts on Oxidation of Soybean Oil

다류원류 식물류의 에탄올 추출물이 대두유의 산화에 미치는 영향

  • 김미혜 (식품의약품안전청 식품평가부) ;
  • 김명철 (식품의약품안전청 식품평가) ;
  • 박종석 (식품의약품안전청 식품평가) ;
  • 박은지 (식품의약품안전청 식품평가) ;
  • 김종욱 (식품의약품안전청 식품평가) ;
  • 송경희 (식품의약품안전청 식품평가) ;
  • 신동우 (식품의약품안전청 식품평가) ;
  • 목진민 (식품의약품안전청 식품평가) ;
  • 이종옥 (식품의약품안전청 식품평가부)
  • Published : 1998.10.01
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Abstract

This study was planned to investigate the effect of 40 plant ethanolic extracts on antioxidant activities in vitro. The total phenolics, $\beta$-carotene, $\alpha$-tocopherol and selenium contents were also determined . Antioxidant activities fo the ethanolic extracts(0.02%, w/w) in the soybean oil were measured both by determining the peroxide value (POV) during 35 days of storage at 4$0^{\circ}C$ in a forced draft air-incubator and by determining changes in conductivity at 11$0^{\circ}C$(Rancimat method.). Soybean oil without any additives was used as a control and that treated with 0.02% BHT was used as a positive control. Based on the POV determination, green tea extract was found to be the most effective in stabilizing soybean oil, then followed by long tea, which both of them showed higher antioxidant activities compared to the BHT treatment. The antioxidant activities of them showed higher antioxidant activities compared to the BHT treatment. the antioxidant activities of coffee, cinnamomi cortex, acanthopanacis cortex, black tea, orange peel , instant coffee, peony and crni fructus extracts were stronger compared to the control .By the Rancimat method, green tea leaf and oolong tea leaf, foxglove, acanthopanacis cortex and peony extracts. Compared to other extracts, green tea leaf, black tea leaf, foxglove, acanthopanacis cortex and peony extracts had stronger antioxidative effects in both the POV and Rancimat methods used in this study. ethanolic extracts which showed the stronger antioxidative effect also has the higher contents of total phenolics, $\beta$-carotene, and/or $\alpha$-tocopherol. The antioxidative effect of ethanolic extracts was found to be due to the combined effect of various antioxidants.

Keywords

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