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Characterization of oil including astaxanthin extracted from krill (Euphausia superba) using supercritical carbon dioxide and organic solvent as comparative method

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Abstract

Krill oil including astaxanthin was extracted using supercritical CO2 and hexane. The effects of different parameters such as pressure (15 to 25MPa), temperature (35 to 45 °C), and extraction time, were investigated. The flow rate of CO2 (22 gmin−1) was constant for the entire extraction period of 2.5 h. The maximum oil yield was found at higher extraction temperature and pressure. The oil obtained by SC-CO2 extraction contained a high percentage of polyunsaturated fatty acids, especially EPA and DHA. The acidity and peroxide value of krill oil obtained by SC-CO2 extraction were lower than that of the oil obtained by hexane. The SC-CO2 extracted oil showed more stability than the oil obtained by hexane extraction. The amount of astaxanthin in krill oil was determined by HPLC and compared at different extraction conditions. The maximum yield of astaxanthin was found in krill oil extracted at 25 MPa and 45 °C.

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Authors and Affiliations

  1. International Program of Fisheries Sciences, Faculty of Fisheries Sciences, Pukyong National University, 599-1, Daeyeon-3dong, Nam-gu, Busan, 608-737, Korea

    Abdelkader Ali-Nehari

  2. Department of Food Science and Technology, Faculty of Fisheries Sciences, Pukyong National University, 599-1, Daeyeon-3dong, Nam-gu, Busan, 608-737, Korea

    Seon-Bong Kim, Yang-Bong Lee, Hye-youn Lee & Byung-Soo Chun

Authors
  1. Abdelkader Ali-Nehari
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  2. Seon-Bong Kim
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  3. Yang-Bong Lee
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  4. Hye-youn Lee
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  5. Byung-Soo Chun
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Correspondence to Byung-Soo Chun.

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Ali-Nehari, A., Kim, SB., Lee, YB. et al. Characterization of oil including astaxanthin extracted from krill (Euphausia superba) using supercritical carbon dioxide and organic solvent as comparative method. Korean J. Chem. Eng. 29, 329–336 (2012). https://doi.org/10.1007/s11814-011-0186-2

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  • DOI: https://doi.org/10.1007/s11814-011-0186-2

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