摘要
通过微波萃取和超临界CO2萃取杜仲籽油的正交试验,考察影响萃取效果的主要因素,寻求最佳萃取工艺条件。微波萃取最佳工艺条件为:以环己烷为萃取剂,原料粉碎度40目,溶剂与物料质量比值为5.0,微波功率700W,每次微波辐射时间50s,微波累计辐射8次,在此条件下油脂得率为27.07%。超临界CO2萃取的最佳工艺条件为:萃取压力35MPa、萃取温度45℃、萃取时间70min、分离温度30℃、CO2流量25~30kg/h,原料粉碎度40目,在此条件下油脂得率27.76%。并比较不同提取方法对油脂得率和油脂品质的影响。结果表明,微波萃取所需时间最短,油脂得率较高;超临界CO2萃取所得杜仲籽油的品质最优,是提取优质杜仲籽油的首选方法。
Eucommia seed oil was obtained with SC-CO2 (supercritical CO2) and microwave. The optimum conditions of the microwave extraction were obtained by orthogonal experiment as follows: cyclohexane solvent, the ratio of solvent to material 5.0, the microwave power 700W, radiation time 50s, radiation times 8 and the material particle size 40 mesh. The orthogonal experiment was used to optimize the SC-CO2 extraction conditions, and the optimum conditions were determined: the extraction pressure 35MPa, the extraction temperature 45℃, the separation temperature 30℃, the extraction time 70 min: the material particle size 40 mesh and the CO2 flow rate 25 -30kg/h. The yield of oil obtained by SC-CO2 and microwave is 27.76%and 27.07%, respectively. The yield and quality of eucommia seed oil with different extraction methods were compared. Results show that extraction time of microwave is shorter than SC-CO2, while the quality of eucommia seed oil by SC-CO2 is better than microwave. So the SC-CO2 extraction is better technique of extracting oil from eucommia seed.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2006年第6期131-135,共5页
Food Science
基金
2004年湖南省技术创新项目(湘经科技[2004]307号)
湖南省社科联重大项目(05042001)
关键词
杜仲籽油
超临界CO2萃取
微波萃取
工艺条件
理化指标
eucommia seed oil
supercritical carbon dioxide extraction
microwave extraction
technology
physics and chemistry index