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A polymer–salt aqueous two-phase system (ATPS) consisting of thermosensitive copolymer ethylene-oxide-b-propylene-oxide-b-ethylene-oxide (EOPOEO) and NaH2PO4 was employed in deproteinization for lycium barbarum polysaccharide (LBP). The effects of salt type and concentration, EOPOEO concentration, amount of crude LBP solution and temperature were studied. In the primary extraction process, LBP was...
A new pH-mediated non-ligand dual cloud point extraction (NL-DCPE) was first developed for extraction Pb(II) from food samples. The NL-DCPE method includes two cloud point extraction (CPE) steps and the recycling of the copolymer. The first procedure was based on the forming of lead hydroxide at pH 9.5 and subsequent lead hydroxide was entrapped in a thermoseparating triblock copolymer [(PEO)10(PPO)...
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