Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Optimal Extraction Conditions to Produce Rosemary Extracts with Higher Phenolic Content and Antioxidant Activity

폴리페놀 함량과 항산화력에 따른 로즈마리의 최적 추출조건 확립

  • Received : 2013.04.30
  • Accepted : 2013.06.02
  • Published : 2013.08.31
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Abstract

We evaluated the effects of temperature, time, solvent type, and solvent concentration on the phenolic content and antioxidant activity of rosemary extracts. The antioxidant capacity of rosemary extracts was demonstrated by their ability to scavenge stable free radicals, and the phenolic content of the extracts was determined using the Folin Ciocalteu method. The highest values were obtained by water-based extraction at $90^{\circ}C$ for 30 min, a 75% methanol solution at $60^{\circ}C$ for 30 min, and a 50% ethanol solution at $70^{\circ}C$ for 10 min. The aqueous solution of 75% methanol, extraction temperature of $60^{\circ}C$, and extraction time of 30 min were the most efficient parameters for the extraction of polyphenols from dry rosemary.

본 연구에서는 로즈마리의 항산화 물질을 최대로 추출할 수 있는 최적의 추출 조건을 확립하였다. 열수 추출의 경우에는 $90^{\circ}C$, 30분 추출할 경우 항산화력($IC_{50}$ 값이 4.49 g DM/L)과 총 페놀함량(28.30 mg GAE/g DM)이 다른 온도와 시간보다 높은 수치를 나타내었다. 에탄올 추출의 경우에는 50%에탄올, $70^{\circ}C$, 10분의 경우가 항산화력($IC_{50}$ 값이 2.60 g DM/L), 총 페놀함량(40.28 mg GAE/g DM)이 다른 농도와 온도, 시간보다 높은 결과를 나타내었다 메탄올 추출 결과는 75% 메탄올, $60^{\circ}C$, 30분의 경우가 항산화력($IC_{50}$ 값이 2.31 g DM/L), 총 페놀함량(57.22 GAE/g DM)이 다른 농도와 온도, 시간보다 높은 수치를 나타내었다.

Keywords

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