摘要
比较了水浸提、微波、超声波等方法预处理北冬虫夏草发酵液对醇沉法提取虫草多糖的影响。研究发现,采用醇沉浓度为70%时,虫草多糖沉淀效果较好。结果表明,三种预处理方法均可增加虫草多糖的提取率:超声波预处理>微波预处理>水提法,其中以超声波预处理效果最好。在超声频率为40kHz,浸提2次的条件下,当超声时间30min、温度80℃、超声功率500W时,虫草多糖提取率为7.965mg/mL。结果显示超声波预处理提取虫草多糖的效果好。
Compared the effect of water extraction, ultrasonic wave, microwave on extraction of polysaccharides from Cordceps militaris（L ） Link. The results showed that when using 70% alcohol the sedimentation effect was better. Three pretreatment method all could improve the extraction rate, ultrasonic wave 〉 microwave 〉 water extraction,and the pretreatment effect of ultrasonic wave was best. The extraction rate of polysaccharides was 7.965mg/mL under the condition of ultrasonic wave frequency 4-0kHz and extraction 2 times when ultrasonic time 30min,temperature 80% and ultrasonic power 500W. The results showed that ultrasonic wave pretreatment was superior.
出处
《食品工业科技》
CAS
CSCD
北大核心
2008年第1期140-142,共3页
Science and Technology of Food Industry
关键词
北冬虫夏草
发酵液
预处理
虫草多糖提取
Cordceps mifitaris（L.） Link
mixed fermentation
pretreatment
Cordycepic polysaccharides extraction
