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7752305 
Journal Article 
Extraction of oil from wet Antarctic krill (Euphausia superba) using a subcritical dimethyl ether method 
Rguta, R; Khatib, SJ; Guil, JM; Lomba, E; Noya, EG; Perdigon-Melon, JA; Valencia, S; Liu, S; Hu, Wei; Fang, Y; Cai, Y; Zhang, J; Liu, J; Ding, Y 
2019 
1 
RSC Advances
EISSN: 2046-2069 
Royal Society of Chemistry 
9 
59 
34274-34282 
English 
WOS:000494684600021 
In this study, a novel method for obtaining high-quality krill oil from wet Antarctic krill by using subcritical dimethyl ether (SDE) was proposed. A response surface design was used to obtain the best SDE extraction parameters. The optimum extraction efficiency of 93.77 ± 0.92% was obtained at a stirring speed of 1030 rpm, temperature of 47 °C and dynamic extraction time of 90 min. Compared with n-hexane, ethanol, supercritical CO2 and subcritical n-butane extraction, the krill oil extracted by SDE exhibited low peroxide values (1.46 ± 0.26 mmol kg-1), high astaxanthin (218.06 ± 4.74 mg kg-1), phosphatidylcholine (PC) (33.95 ± 0.65%), and phosphatidylethanolamine (PE) (11.67 ± 0.23%) content. Moreover, krill oil extracted by SDE has high levels of EPA (16.38 ± 0.05%) and DHA (7.91 ± 0.07%). SDE extraction proved to be an efficient and safe method for extraction of quality krill oil from wet Antarctic krill, and it could be a promising method for oil extraction in wet food in future. © 2019 The Royal Society of Chemistry.