食品科学 ›› 0, Vol. ›› Issue (): 0-0.

• 基础研究 •    下一篇

大孔吸附树脂对野刺梨果汁单宁脱除及其色泽影响研究

岳珍珍1,王静2,邢颖1,雷宏杰1,徐怀德1   

  1. 1. 西北农林科技大学食品科学与工程学院
    2. 西北农林科技大学
  • 收稿日期:2015-12-21 修回日期:2016-08-02 出版日期:2016-09-15 发布日期:2016-09-22
  • 通讯作者: 徐怀德 E-mail:xuhuaide@yahoo.com.cn

Study on decolorization and tannin removal efficiency of Rosa Roxburghii Tratt juice with macroporous adsorbent resins

2, 2,Xu Huai-De   

  • Received:2015-12-21 Revised:2016-08-02 Online:2016-09-15 Published:2016-09-22
  • Contact: Xu Huai-De E-mail:xuhuaide@yahoo.com.cn

摘要: 为有效脱除野刺梨果汁中的单宁和色素,选用四种大孔吸附树脂对野刺梨果汁进行脱色和脱单宁处理,以提高野刺梨果汁品质。结果表明,与其它三种树脂相比,LX-60大孔吸附树脂的吸附效果最好,当树脂用量为4.0 g时,脱色率为88.18 %,单宁脱除率为44.12 %,且LX-60树脂的吸附等温线符合Freundlich方程。大孔吸附树脂吸附后野刺梨果汁总糖和多酚含量显著下降至79.47%和70.18%,可溶性固形物、可滴定酸和pH的保留率分别为、81.40%、84.62%和101.99%。在动态吸附试验中,野刺梨果汁在上样量为5倍柱体积,流速为3.3 mL/min的条件下,LX-60对色素类物质和单宁的脱除率分别为71.56 % 和21.17 %,脱除效果较好。因此,LX-60大孔吸附树脂能够有效脱除野刺梨果汁中的单宁和色素类物质并改善品质。

关键词: 大孔吸附树脂, 野刺梨, 脱色, 单宁, 吸附等温线

Abstract: in order to improve the nutritional quality of juice, four kinds of macroporous adsorbent resins were used to decoloration and tannin removal experiments for Rosa Roxburghii Tratt juice, which we selected were LSA-600, LX-920, LX-60 and LX-8. LX-60 exhibited the highest decolorization capacities for Rosa Roxburghii Tratt juice, decolorization and tannin removal efficiency of which was 88.18% and 44.12% respectively. After adsorption polyphenols and total sugar content in Rosa Roxburghii Tratt juice was significantly decreased to 79.47% and 70.18%, soluble solids, titratable acidity and pH were 81.40%, 84.62% and 101.99 %. On the basis of static adsorption, LX-60 were selected for adsorption isotherms. The experimental data fitted better to Langmuir isotherm model for all four resins. Dynamic testing was done on a column packed with LX-60 resin, Six bed volumes and 3.3mL/min flow rate of Rosa Roxburghii Tratt juice resulted in better decolorization and tannin removal efficiency.

Key words: macroporous adsorbent resins, decolorization, tannin, Rosa Roxburghii Tratt , adsorption isotherm

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