响应面优化低共熔溶剂提取乌龙茶多糖的研究

传统多糖提取使用的有机和无机溶剂，普遍存在提取时间长，溶剂消耗量大、提取效率低和一定的污染问题，探索新型安全溶剂成为多糖提取的热点问题。低共熔溶剂（low eutectic solvent，DES）作为一种新兴绿色溶剂，具有多种传统有机溶剂不具备的溶剂特性，近年来在植物多糖提取领域得到广泛应用。本文综述了DES的组成、主要性质、合成方法及影响其性质的重要因素，同时总结论述了DES在茶多糖、中草药多糖和果皮果胶等植物多糖提取中的应用研究进展。相较于传统的水和酸碱法提取，DES提取条件相对温和且能耗更低，提取的植物多糖具有更高的提取率和纯度，而且多糖的生物活性和生物完整性更好，进一步阐述了DES在植物多糖提取中的应用局限性和潜力，旨在为DES在植物多糖提取相关研究提供思路借鉴和理论参考。

Consecutive and progressive purification of food-derived natural polysaccharide: Based on material,extraction process and crude polysaccharide

The traditional organic and inorganic solvents used for polysaccharide extraction generally have long extraction time, large solvent consumption, low extraction efficiency and certain pollution problems, and the exploration of new safe solvents has become a hot issue in polysaccharide extraction. As an emerging green solvent, low eutectic solvent (DES) has a variety of solvent characteristics that traditional organic solvents do not possess, and has been widely used in the field of plant polysaccharide extraction in recent years. In this paper, the composition, main properties, synthesis method and important factors affecting the properties of DES are reviewed, and the progress of the application of DES in the extraction of plant polysaccharides such as tea polysaccharides, herbal polysaccharides and peel pectin are summarized.Compared with traditional water and acid-base extraction, the extraction conditions of DES are relatively mild and the energy consumption is lower. The extracted plant polysaccharides have higher extraction rate and purity, and the biological activity and biocompleteness of polysaccharides are better. The limitations and potentials of DES in plant polysaccharide extraction are further elaborated, aiming to provide ideas and theoretical references for the research related to the extraction of plant polysaccharides by DES.