Affinity Partitioning of Metal Ions in Aqueous Polyethylene Glycol/Salt Two-Phase Systems with PEG-Modified Chelators
作者： P. A. Aguiñaga-DÍAz , R. Z. Guzman
DOI: 10.1080/01496399608001408
关键词: PEG ratio 、 Polyethylene glycol 、 Liquid–liquid extraction 、 Aqueous solution 、 Chemistry 、 Partition coefficient 、 Inorganic chemistry 、 Metal ions in aqueous solution 、 Chelation 、 Sodium sulfate
摘要: Abstract The systematic partitioning of metal ions in the presence polyethylene glycol (PEG) chelate derivatives PEG/salt two-phase systems is described. Results show that enhanced significantly, and this effect apparently based on characteristics binding nature ion addition to attached PEG molecule. Previous work with PEG-iminodiacetic acid has been extended chelating PEG-TED [tris(carboxymethyl)ethylene diamine], PEG-TREN-Cm [carboxy-methylated-tris(2-aminoethyl)amine], PEG-ASP (aspartic acid). Their effectiveness selectively partition demonstrated discussed. experiments were performed using (8000 MW), sodium sulfate, PEG-chelating derivatives, different concentrations copper, nickel, cobalt as model ions. Partition coefficients (ratio top bottom concentrations) greater than 1 obtained f...
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