【摘要】 菊糖具有很高的营养价值和良好的功能性质,但由于粗菊糖含盐量高,粗蛋白多,含有大量的单、双糖,限制了其在食品工业中的应用,所以需要对粗菊糖进行纯化。鉴于已报道的一些纯化方法存在一些不足,本文讨论了电渗析对粗菊糖纯化过程的影响。在不同操作电压下,分析了粗菊糖在电渗析过程中电导率、pH、灰分,粗蛋白质含量,和糖分组成的变化。电渗析1h后,粗菊糖料液中灰分的去除率达到70%,粗蛋白质去除率达到47%,同时电渗析不会引起菊糖糖分组成的明显变化。实验证明电渗析对除去粗菊糖中的无机盐和游离氨基酸非常有效,能大大减轻后续纯化操作的压力,是粗菊糖纯化的一种经济、有效的操作。更多还原

【Abstract】 Inulin is well recognized to be nutritious as food ingredient with good functionalities. Because of impurities including salts, crude protein, mono-and disaccharides, the crude inulin can not be widely used in human foods. Current purification operations have their own shortcomings, while a new operation of electrodialysis is evaluated with different operation voltage in the purification process of the crude inulin to remove salts and proteins. The tendency analysis of conductivity, pH, ash content, crude protein content, and sugar profile has indicated that electrodialysis is a feasible operation to remove the charged impurities, such as salts (70% removed after 1h) and crude protein (47% removed after 1h), without remarkable change of sugar profile. Being an economical and efficient purification operation, electrodialysis may alleviate the load of downstream operations.更多还原