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EXTRACTION AND ANALYSIS OF FLAXSEED OIL BY SUPERCRITICAL CO2 METHOD OPTIMIZED BY RSM AND GC-MS

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Author: Liu Mo, Wang Mengxi, Chen Dongya, Kong Lingyan, Xue Mei and Lei Hong

Abstract: Flaxseed oil has already been widely used in food production in recent years as of its prominent biological functions. This study was aimed to obtain high-quality flaxseed oil and find the suitable extraction parameters, exploiting response surface methodology of a three-variable, three-level Box-Behnken experimental design. In this study, supercritical CO<sub>2</sub> extraction technology was used to extract flaxseed oil. The chemical composition of flaxseed oil was investigated by Gas Chromatography-Mass Spectroscopy. Results showed that the optimal conditions were extraction time of 4.58 h, extraction temperature at 51&deg;C, and extraction pressure at 31 MPa. Under these conditions, the highest extraction yield of flaxseed oil was 23.95%. 9, 12, 15-Octadecatrienoic acid was indicated to be the highest content according to GC-MS analysis, with the content of 75.22%. In conclusion, supercritical CO<sub>2</sub> extraction was proved to be an effective technique for extracting oil from flaxseed, and Gas Chromatography-Mass Spectroscopy provided the satisfactory method of analyzing flaxseed oil from flaxseed for industrial need.

Keywords: Box-Behnken experimental design, Flaxseed oil, Gas Chromatography-Mass Spectroscopy, Response surface methodology, Supercritical CO2 extraction technology

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