The aqueous two-phase system has been applied to the separation of biomolecules because of its gentle character, easy operation and high separating efficiency.

• 摘要双水相体系由于性质温和、操作方便、分离效率高，以及不会导致被分离物质的破坏和失活等优点，被广泛应用于生物大分子物质的分离和纯化。