食品科学 ›› 2002, Vol. 23 ›› Issue (6): 88-90.

• 工艺技术 • 上一篇    下一篇

Al3+沉淀法对茶多酚制备效果的影响研究

 周志, 汪兴平, 莫开菊, 张家年   

  1. 湖北民族学院园艺系,华中农业大学食品科学系
  • 出版日期:2002-06-15 发布日期:2012-02-13

Studies on the Effect of Al3+ Sedimentation Method on the Result of Preparing Tea -polyphenol

 ZHOU  Zhi, WANG  Xing-Ping, MO  Kai-Ju, ZHANG  Jia-Nian   

  • Online:2002-06-15 Published:2012-02-13

摘要: 本文以铝盐作沉淀剂,研究了Al3+沉淀提取茶多酚的工艺条件。结果表明:Al3+沉淀茶多酚的最佳pH值范围为5.3~5.7,茶多酚沉淀率达92.22%~95.28%。0.1mol/L的AlCl3.6H2O加入体积量x(mol)与茶多酚沉淀率y(%)的线性回归方程为y=17.768+64.657x,相关系数r=0.9148.经F检验,该回归方程在а=0.05水平上显著。茶多酚—铝盐的最佳转溶条件为∶茶多酚一铝盐沉淀用pH1.5的酸溶液,以料酸比1∶2(V/V)于60℃水浴中转溶15min,1次,茶多酚的转溶率达79.09%。

关键词: 铝盐, 沉淀法, 茶多酚, 工艺

Abstract: Using Al 3+ as sedimentationagent,the technological conditionof extracting Tea -polyphenols was stud-ied.The result showed that the optim al range of pH was from 5.3~5.7and the sedimentation rate was 92.22%~95.28%.The regressionequationof x(mol)(volume of0.1mol /LAlCl 3 .6H 2 O)and y (%)(TPsedimentationrate)was y =17.768+64.657x(r =0.9148).Ftest demonstrated that the regression equation was remarkable at the l evel ofα=0.05.UsingacidsolutionwithpH1.5todissolveTP -Al 3+ (ratiobetweenexperimentalsolutio nandacidsolution was 1∶2),the mixture of acidsolution and TP -Al 3+ was soakedinthe water(50℃)in15minutes.The result showed that the dissolved rate of TPwas 79.09%and that it was the optimal dissolv ed condition.

Key words: A3+ sedimentation method , Tea -polyphen ols , Technology