Optimization and evaluation of wheat germ oil extracted by supercritical CO2

Grasas y Aceites

LiYa Niu¹  Shao Tong Jiang¹ 

[1] School of Biotechnology and Food Engineering, Hefei University of Technology;

关键词: defatted wheat germ;    response surface methodology;    supercritical carbon dioxide extraction;    wheat germ oil;   

DOI  :  10.3989/gya.078710

来源: DOAJ

【 摘 要 】

Box-Behnken design combined with response surface methodology (RSM) was used to optimize the parameters of supercritical CO2 extraction (SFE) of wheat germ oil. The quality of the oil and residual meal obtained by SFE and solvent extraction (SE) were evaluated from proximate analysis, fatty acid composition and antioxidant activity. A maximum oil yield of 10.46% was achieved under the optimal conditions of wheat germ particle size 60-80 mesh; water content 4.37%; pressure 30MPa; temperature 40°C extraction time 1.7h. The oil obtained by SFE showed stronger DPPH radical scavenging ability than SE oil at the same concentration. The fatty acid composition of SFE oil was similar to SE oil. Higher contents of protein (34.3%) and lysine (2.47g/100g) were found in the residual meal obtained by SFE. The results show that oil and defatted meal obtained by SFE can be promising nutritional sources for food.

【 授权许可】

Unknown