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Food Engineering Progress
Korean Society for Food Engineering

Food Eng. Prog. 2011; 15(2):175-181

pISSN: 1226-4768, eISSN: 2288-1247

DOI: https://doi.org/10.13050/foodengprog.2011.15.2.175

Article

초임계 CO2유체 추출법을 이용한 탈지미강 중 표면활성물질 추출의 최적화

이형주1, 이의석1, 홍순택1,*
Extraction of Surface-Active Substances from Defatted Rice Bran by Supercritical Carbon Dioxide
Hyong-Ju Lee1, Eui-Suk Lee1, Soon-Taek Hong1,*
1충남대학교 식품공학과
1Department of Food Science and Technology, Chungnam National University
*Corresponding author: Soon-Taek Hong, Department of Food Science and Technology, College of Agriculture and Life Science, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon, 305-764, Republic Korea, Tel: +82-42-821-6727; Fax: +82-42-821-7876, E-mail: hongst@cnu.ac.kr

ⓒ Copyright 2011 Korean Society for Food Engineering. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Apr 25, 2011; Revised: May 18, 2011; Accepted: May 18, 2011

Published Online: May 31, 2011

Abatract

By using supercritical carbon dioxide fluid, an attempt was made to extract surface-active substances from defatted rice bran. Extraction was carried out according to D-optimal design and results were analyzed by response surface methodology to establish optimum condition. It was found that pressure, temperature and co-solvent (ethanol) influenced in a different extent on the extraction efficiency (i.e., yield and interfacial tension) of surface-active substances. Among them, co-solvent was found to be a major influencing factor, where maximum yield (2.62%) was observed at the highest content (250 g). In addition, it also affected most on the interfacial tension at the oil-water interface but in this case the lowest interfacial tension value (9.51 mN/m) was found when added lowest (50 g). In conclusion, it was estimated that the optimum extraction condition was to be pressure 350bar, temperature 62°C and co-solvent content 50 g in this study, where extraction yield was 0.69% and interfacial tension to be 10.1 mN/m.

Keywords: rice bran; supercritical carbon dioxide extraction; surface-active substances; interfacial tension