COMPARISON OF FLAXSEED MEAL LIPIDS EXTRACTED WITH DIFFERENT SOLVENTS

The quality and composition of lipids extracted from a commercial flax seed meal using methanol, aqueous methanol and aqueous methanol-ammoni a as primary solvents were investigated. Separation and quantification of individual lipid classes were performed by utilizing thin-layer ch romatography with flame ionization detector. Aqueous methanol-ammonia extracted the least amount of lipid in the meal. Methanol preferential ly extracted polar lipids and monoglycerides. The composition of lipid extracted with aqueous methanol-ammonia was altered only when hexane was used as the secondary solvent. Distribution of the fatty acids of total and polar lipids, triglyceride, wax and sterol ester fraction of lipids was affected by aqueous methanol-ammonia-hexane solvent extrac tion. (C) 1996 Academic Press Limited