Ultrasound-assisted Acidolysis Optimization of Extraction Process of Fatty Acids from Purslane Seed Oil and its Component Analysis
To optimize the extraction process of purslane seed fat,determine the seed fat content and fatty acid composition analysis,and provided a basis for the development of functional food.Portslane seed fat was extracted by ultrasound-assisted acidolysis and soxhlet extraction,and the fatty acid composition was analyzed by gas chromatography.The results showed that the optimal process conditions were hydrochloric acid concentration of 8 mol/L,ratio liquid-solid of 1∶6,acid lysis tempera-ture of 80 ℃,ultrasound time of 40 min.The fat extraction rate of purslane seed was 12.0％ (by ultrasound-assisted acidoly-sis).Compared with the soxhlet extraction method,5 h was saved with a 2％ higher extraction rate.Ununsaturated fatty acids obtained by ultrasound-assisted acidolysis accounted for 77.2％ of the total fatty acid content,which was 3.5％ higher than the soxhlet extraction method.By ultrasound-assisted acidolysis,the extraction process of seed fat was optimized.In addition,the method combined with gas chromatography to analyze its composition was efficient,feasible and easy to operate,which was of great significance for the further development of purslane.
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