Enhanced Extraction of Oil from Flaxseed (Linum usitatissimum L.) Using Microwave Pre-treatment

• Published in: Journal of Oleo Science Vol. 64; no. 10; pp. 1043 - 1047
• Main Authors: Ren, Guangyue, Zhang, Wei, Sun, Shangde, Duan, Xu, Zhang, Zhenshan
• Format: Journal Article
• Language: English
• Published: Japan Japan Oil Chemists' Society 2015; Japan Science and Technology Agency
• Subjects: Chemical Fractionation - methods; Chromatography, Gas; Electronics; Extraction; Fatty acids; Fatty Acids - analysis; Flax - chemistry; Flax - ultrastructure; flaxseed; hot extraction; Hot Temperature; Linseed Oil - chemistry; Linseed Oil - isolation & purification; Microscopy; Microscopy, Electron, Scanning; microwave pre-treatment; Microwaves; oil; Powders; Pretreatment; Scanning; Stearic acid
• ISSN: 1345-8957; 1347-3352
• DOI: 10.5650/jos.ess15099

The effect of microwave (MW) pre-treatment on the extraction of flaxseed oil was investigated by hot extraction (HE). Nine MW pre-treatments were established, combining three MW radiation intensities (12, 18 and 24 W/g) and three MW radiation times of pre-treatment (90, 150 and 210 s). Extraction yield increased significantly with MW pre-treatments of flaxseed, and a max oil extraction yield (78.11%) can be obtained using MW pre-treatment at 18 W/g for 210 s. Scanning electronic microscopy showed that the microstructure of treated samples (18 W/g and 210 s) was modified compared with that of untreated samples. The fatty acid compositions (palmitic acid 5.85±0.01%, stearic acid 3.00±0.01%, oleic acid 17.64±0.07%, linoleic acid 16.16±0.06%, and linolenic acid 57.37±1.32%) of the oils extracted by the MW pre-treatments HE were similar with that of the conventional HE method. Results showed that fatty acid compositions of flaxseed oil were not affected by MW pre-treatments.