中文摘要：

双水相技术是一种新型的液-液萃取技术,由于其条件温和、易操作等特点,目前已广泛应用于物质的分离、纯化。本文综述了双水相形成原理、工艺流程和特点、体系类别、影响双水相分配的因素及其在分离纯化中的应用,并针对其未来发展趋势进行了展望。

英文摘要：

Aqueous two-phase extraction was a new fluid-fluid extraction technology.Owing to its characteristics of temperate condition,simple operation and so on,it had been widely applied to separation and purification of materials.The principle of formation,technical process and features of aqueous two-phase extraction were summarized,moreover the system category and the factors affecting its assignment performance were mentioned.Meanwhile,the practical application and forecasts,the development in the future was introduced.