Isomaltose hypgather and preparation method thereof

The invention provides isomaltooligosacharide and a preparation method thereof, and belongs to the technical field of functional sugar manufacturing. Maltose, glucose and water are mixed to obtain syrup; sequentially adjusting the pH value of the syrup, mixing with transferred glucosidase, carrying out enzymatic conversion, feeding maltose, continuing enzymatic conversion, and after feeding, continuing heat preservation and enzymatic conversion to obtain an isomaltooligosacharide liquid; the isomaltooligosacharide liquid is sequentially subjected to decoloration, ion exchange refining and chromatographic separation and purification to obtain the isomaltooligosacharide, the purity of the prepared isomaltooligosacharide is larger than or equal to 98%, and the total mass content of isomaltose and isomaltotriose is larger than or equal to 90%. 本发明提供了一种低聚异麦芽糖及其制备方法，属于功能糖制造技术领域，本发明以麦芽糖、葡萄糖和水混合得到糖浆；将糖浆依次进行调节pH后混合转移葡萄糖苷酶进行酶转化然后流加麦芽糖继续酶转化，流加结束后继续保温酶转化得到低聚异麦芽糖液；将低聚异麦芽糖液依次经过脱色、离子交换精制和色谱分离提纯得到低聚异麦芽糖，制得的低聚异麦芽糖纯度≥98%，其中异麦芽