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A promising concept of aqueous two‐phase extraction (ATPE) is the Tunable Aqueous Polymer Phase Impregnated Resins (TAPPIR®) technology. Thereby, one phase of an aqueous two‐phase system (ATPS) is immobilized inside porous solids, which are then dispersed in the second aqueous phase. Beside extraction performance, the reusability of the impregnated solids for several cycles decides upon the competitiveness...
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