摘要
通过正交试验优化了杜仲汁的浸提参数,得出杜仲汁的最佳浸提条件为浸提温度80℃,浸提时间30 min,叶水比1:20,提取汁中有效成分含量较高.温度对杜仲汁的透光率有较大的影响,随着杜仲汁加热温度升高,透光率下降,杜仲汁加热时间延长,透光率下降.在杜仲饮料加工中尽可能减少加热处理.pH值对杜仲浸提汁的透光率有较大影响,pH7时透光率最高,pH4～5时颜色最好.杜仲汁极易褐变,添加β-CD、Na2SO3、Vc可防止杜仲汁色泽的褐变.
this paper studied extraction parameters of the liquid extract from Eucomrnia ulrnoides leaves by orthogonal experiment extracting time：30 rnin ,temperature..80℃, ratio of leaf to water： 1 ： 20. transmittancy of the extract were influenced by temperature.lower under higher temperature and longer time. Higher temperature must be avoided in extracting process. Transmittancy of E. ulmoides was highest at pH 4-5. Extraction liquid was easier to browning,so adding β-CD .Na2SO3 and Vc can prevent browning.
出处
《西北林学院学报》
CSCD
北大核心
2005年第4期140-142,共3页
Journal of Northwest Forestry University
关键词
杜仲
浸提
褐变
Eucommia ulmoides
extracting
browning
