摘要
在分析茶渣主要成分含量基础上,研究以酸、碱处理和脱脂制备茶叶水不溶性膳食纤维.结果表明,酸的种类对水不溶性膳食纤维含量的影响不显著,pH的影响显著.在考察HCl溶液的pH、温度及时间对水不溶性膳食纤维含量的单因素影响规律基础上,采用L9(34)正交试验优化酸提取工艺,优化的结果为:pH为1、温度90℃、时间1.5 h,获得水不溶性膳食纤维含量为31.27%的初品,初品得率为58.30%.采用NaOH溶液对初品进一步处理,在研究pH、温度及时间对水不溶性膳食纤维含量的单因素影响规律基础上,采用L9(34)正交试验优化碱提取工艺,优化的结果为:pH13.5、温度90℃、时间3h,获得水不溶性膳食纤维含量为85.25%的中间品,中间品得率为21.47%.中间品经乙醚脱脂后制备的茶叶水不溶性膳食纤维产品中的水不溶性膳食纤维含量为91.32%,产品得率为20.11%.
Tea residue was used as raw material. Based on the analysis results of main component in the tea residue, tea insoluble dietary fiber extraction technology with acid and alkali treatment and degreasing was studied. The results showed that the type of acid had no significant effect on insoluble dietary fiber content, while pI I value had a significant effect. After investigated the single fac tor influencing regularities of the pH value of HC1 solution and extraction temperature and time on insoluble dietary fiber content, timized HCI hydrolyzation conditions with L9 （34 ） orthogonal experiment are as follows ： pH value is 1, temperature is 90 ~C and time is 1.5 h. On the conditions, obtained initial product has an insoluble dietary fiber content of 31.27%, yield is 58.30%. Then the initial product hydrolyzed with NaOH solution. Based on the single factor influencing regularities of the pH value and extraction temperature and time on insoluble dietary fiber content, optimized NaOH extraction conditions are as follows： pH value is 13.5, temperature is 90 ℃ and time is 3 h. Obtained intermediate product has an insoluble dietary fiber content of 85.25%, yield is 21.47. The intermediate product further degreased by aether, final product has 91.32% insoluble dietary fiber, yield is 20.11%.
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2011年第2期198-204,共7页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
福建省教育厅资助项目(JA08073)
关键词
茶叶
茶渣
水不溶性膳食纤维
提取
tea
tea residue
insoluble dietary fiber
extraction
