摘要
超声波对植物粉末中提取有效成分过程的作用进行了实验研究,并以大豆粉末为原料,以70%乙醇水溶液为溶剂进行了循环超声提取大豆异黄酮的实验。以实验测得的大豆异黄酮提取率随提取时间变化的数据,按照无扩散阻力的缩核模型和有效成分扩散控制模型分别进行了数据处理。结果表明,无扩散阻力的缩核模型能较好地描述植物粉末有效成分的超声提取过程,其控制步骤主要是颗粒中核-壳界面层细胞破碎过程。
Extraction process of active compounds from plant powders by ultrasoniation was observed, and extraction experiments of isoflavones from defatted soybean powders by ultrasonic and 70% alcohol-water solution as extraction agent were carried out. Experimental data of isoflavones extraction were fitted respectively by core shrink model without diffusion resistance and diffusion control model. Results showed that core shrink model was better than diffusion control model in ultrasonic extraction of active components from plant powders, and the rate-limiting step for ultrasonic extraction was mainly the process of cell disruption within interface between active component core and shell in plant particle.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2005年第4期320-326,共7页
Chemical Reaction Engineering and Technology
基金
重庆市科委应用基础研究项目(合同编号7855)
关键词
超声波
动力学模型
提取
有效成分
植物粉末
ultrasonication
kinetic model
extraction
active components
plant powders
