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http://dx.doi.org/10.12925/jkocs.2014.31.2.285

On study antioxidant effect and aroma component of natural citrus by SC-$CO_2$ Extraction  

Lim, Deok-Jum (Dept. of Industrial Chemistry, Pukyoung National University)
Chun, Byung-Soo (Food Science & Technology, Pukyoung National University)
OH, Dae-Hee (Dept. of Industrial Chemistry, Pukyoung National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.31, no.2, 2014 , pp. 285-295 More about this Journal
Abstract
Citrus essential oil were extracted from citron peel of cultivated in Gohong (CCP) using environmentally friendly supercritical carbon dioxide method. Antioxidant activity and aroma composition of the essential oils extracted by the SC-$CO_2$ method were evaluated by comparing with those extracted by organic solvent method. Fatty acid composition, DPPH scavenging, and antioxidant activity of the oils obtained by different extraction condition of SC-$CO_2$ method were investigated and their antioxidant activities were compared with commercially available lavender, eucalyptus and tea tree oils. As the results, linoleic acid was most abundantly found from CCP oil extracted by the SC-$CO_2$ method and cis-11,144-eicosadienoic acids was second abundantly found. Radical scavenging ability of DPPH was 98% when the concentration of CCP oil was 50 mg/mL. This scavenging ability increased with the increase of oil concentration. On the other hand, flavonoids content (84 mg/100g) of the CCP oil extracted by the SC-$CO_2$ method was slightly higher than that (75 mg/100g) by hexane extraction. The results, obtained from CCP oil by GC-MS, indicated that, among 66 components, the content of terpenes was 55.8% and limonene was 27.3%.
Keywords
Limonene; DPPH free radical scavenging; SC-$CO_2$ extraction; citrus; fatty acid composition;
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