Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Optimization in Extraction Conditions of Carotenoids from Citrus unshiu Press Cake by Supercritical Carbon Dioxide

초임계 이산화탄소에 의한 감귤박으로부터 카로테노이드 추출 조건의 최적화

  • Lim, Sang-Bin (Department of Food Science and Engineering, Cheju National University) ;
  • Jwa, Mi-Kyung (Department of Food Science and Engineering, Cheju National University)
  • Published : 2003.12.01
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Abstract

Response surface methodology (RSM) was used to investigate the effects of the processing parameters on supercritical $CO_2\;(SC-CO_2)$. extraction of total carotenoids and ${\beta}$-cyptoxanthin from Citrus unshiu press cake. The parameters tested were $SC-CO_2$ pressure, dynamic extraction time, and concentration of ethanol added as the modifier to $CO_2$. Experimental data correlated well with the processing parameters (p<0.01), and there was a high statistically significant multiple regression relationship for the extraction of total carotenoids and ${\beta}-cyrptoxanthin$ ($R^2=0.9789$ and 0.9796, respectively). The optimal processing conditions were extraction pressure 33.4 and 37.3 MPa, extraction time 39.6 and 41.0 min, ethanol concentration 18.6 and 17.0% for total carotenoids and ${\beta}-cryptozanthin$, respectively. Maximum extraction yields predicted by RSM were 61.1 and 95.8% ppm, respectively. The extraction yield of total carotenoids increased asymptotically with the increase of the extraction pressure. It increased in proportion to extraction time and concentration of the cosolvent. The extraction yield of ${\beta}-cryptoxanthin$ increased with extraction pressure, extraction time, and concentration of the cosolvent. The extraction time and the concentration of the cosolvent, and the interaction between extraction time and the concentration of the cosolvent significantly affected the extraction yields of carotenoids from C. unshiu press cake.

초임계 이산화탄소를 이용하여 감귤박으로부터 ${\beta}$-cryptoxanthin을 포함한 carotenoids의 추출수율을 극대화하기 위하여, 주요 요인 변수인 추출 압력, 추출시간, 보조용매의 농도 등 추출 조건을 반응표면분석법에 의해 최적화하였다. Total carotenoids와 ${\beta}$-cryptoxanthin의 추출수율에 대한 반응표면 회귀방정식의 $R^2$는 각각 0.9789과 0.9796이었고, 1% 이내의 수준에서 유의성이 인정되었다. 추출조건에 따라 예측된 정상점은 안장점이었으며 능선분석을 실시한 결과 total carotenoids과 ${\beta}$-cryptoxanthin의 최대 추출수율은 각각 61.1%와 95.8%로 예측되었으며, 이 때의 추출 압력, 추출시간, ethanol의 농도는 각각 33.4MPa/39.6min/18.6%와 37.3 MPa/41.0 min/17.0%이었다. Total carotenoids의 추출수율은 추출 압력의 증가에 따라 증가하였지만 압력이 높을수록 일정한 값에 도달하는 경향을 보인 반면, 추출시간과 보조용매의 농도 증가에 따라 연속적으로 증가하였다. ${\beta}-Cryptoxanthin$의 추출수율은 추출 압력, 추출시간, 보조용매의 농도 증가에 따라 연속적으로 증가하였다. 감귤박으로부터 carotenoids의 추출에는 추출시간과 보조용매의 농도 사이의 상호작용이 중요한 역할을 하였다.

Keywords

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