Optimization of purification of α-linolenic acid from flaxseed oil by urea inclusion method
In this paper,using flaxseed oil as the raw material oil,α-linolenic acid as the target product for extraction,the effects of different volume ratios of fatty acids to urea solution,concentration of urea ethanol solution,inclusion temperature,and inclusion time on α-linolenic acid extraction rate were investigated by using the single factor method to optimization the α-linolenic acid extraction process.The experimental results show that when the volume ratio of fatty acids to urea solution is 1∶45,the concentration of urea ethanol solution is 1 mol·L-1,the inclusion temperature is-15℃,and the inclusion time is 24 hour,the extraction rate of α-linolenic acid can reach 81％.Finally,the purified α-linolenic acid was characterized by liquid chromatography,and α-linolenic acid peaks at 12.5 minutes,which was consistent with the peak position of α-linolenic acid.
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