摘要
亚临界水萃取法是一种绿色新型样品萃取技术,试验利用亚临界水技术萃取具有抗氧化以及降血脂等多种药理作用的薏米多糖。以多糖的提取率为指标,在单因素试验的基础上,采用正交试验确定薏米多糖的最佳提取条件,再与水浸提法和超声辅助提取法进行比较。结果表明最佳萃取工艺为:亚临界水温度130℃、提取时间33min、液料比70︰1(mL︰g)、萃取压力0.8 MPa、pH 5、薏米粒径60目,此时薏米多糖的提取率为3.66%±0.02%。同水浸提法和超声辅助提取法相比,亚临界萃取法大大缩短了提取时间,并且提高了薏米多糖的提取率。
Subcfifical water extraction is a kind of green and new technology. Coix seed polysaccharide has many pharmacological activities, such as antioxidant and hypolipidemic. The purpose of the experiment is that polysaccharide was extracted from coix seed by using subcrifical water. Based on the polysaccharide yield, the optimal parameters of polysaccharide extraction from coix seed were determined by performing the single factor and orthogonal experiments, and compared with water extraction and ultrasonic- assisted extraction. The results showed that tile optimal extraction conditions were subcritical water temperature 130℃, time 33 min, liquid-material ratio 70 ： 1 （mL ： g）, the pressure 0.8 MPa, pH 5 and particle size 60 meshes. Under this condition the coix seed polysaccharide yield was 3.66%±0.02%. Compared with water extraction and ultrasonic-assisted extraction, the subcritical water extraction shortens the extract time greatly and enhances the yield of coix seed polysaccharide obviously.
出处
《食品工业》
北大核心
2014年第1期94-97,共4页
The Food Industry
关键词
薏米
多糖
亚临界水
萃取
coix seed
polysaccharide
subcritical water
extraction
