Food grade xylooligosaccharides (XOS) have a high application value, but most of the reported purification methods of XOS use organic solvents, which has significant problems such as large amount of solvent, residual solvent, and difficulty in solvent recovery. In addition, although there are many reported methods of separation and purification, quantitative analysis is lacking for each specific treatment step, such as sugar loss rate, decolorization rate, protein removal rate, and desalination rate. Therefore, purification of XOS from bamboo with non-organic solvent to prepare food grade functional sugars was presented by this study. What’s more, quantitative analysis and optimization was made for each step of separation, which was of great significance for guiding the actual production. Overall, through activated carbon adsorption, ion exchange and membrane filtration comprehensive treatments, food grade XOS were obtained from bamboo with 7.5% yield, a purity of 92.3%, and a total sugar proportion as high as 98.9%.

食品级低聚木糖（XOS）具有较高的应用价值，但目前报道的XOS纯化方法大多使用有机溶剂，存在溶剂量大、溶剂残留、溶剂回收困难等显着问题。此外，虽然报道的分离纯化方法很多，但缺乏对每个具体处理步骤的定量分析，如糖损失率、脱色率、蛋白质去除率和脱盐率。因此，本研究提出用非有机溶剂从竹子中纯化 XOS 以制备食品级功能糖。并且对分离的每一步都进行了定量分析和优化，对指导实际生产具有重要意义。总的来说，通过活性炭吸附，