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The effect of a drop coalescer on phase separation in a PEG/salt aqueous two-phase system (ATPS) in the absence and presence of protein has been investigated. Raschig rings of ceramic, PTFE and glass were used as a drop coalescer in order to separate the mixture into two phases. Among the three materials PTFE is the most effective in coalescing the dispersed drops, with the throughput with PTFE being...
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