caa a22 4500 469110465 CHVBK 20180323133109.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF02037481 doi (NATIONALLICENCE)springer-10.1007/BF02037481 Unloaded polyether type polyurethane foams as solid extractants for trace elements [Elektronische Daten] [S. Palágyi, T. Braun] Polyether type polyurethane foams (PU) are regular stacks of solid quasi-spherical membranes produced by the reaction of polyisocyanates with polyols of polyether nature in the presence of a catalyst and a blowing agent. Contrary to conventional membrane separations, where a solid membrane is merely a differentially separating agent, or a transport medium, PU foams, apart from separation and preconcentration, also retain, i.e., sorb the species on, or in the membranes. Therefore, PU foam membranes can be considered to act as true sorbents. The membrane properties of PU foam sorbents offer unique advantages over conventional bulk type granular sorbents in rapid, versatile and effective separations and preconcentrations of different compounds from fluid samples. Unloaded PU foam sorbents have received considerable attention in the separation of different trace inorganic species. Akadémiai Kiadó, 1992 Palágyi S. Institute of Radioecology and Applied Nuclear Techniques, P.O. Box A-41, 040 61, Kosice, (Czecho-Slovakia) aut Braun T. Institute of Inorganic and Analytical Chemistry, L. Eötvös University, 112 P.O. Box 32, H-1518, Budapest, (Hungary) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 163/1(1992-11-01), 69-79 0236-5731 163:1<69 1992 163 10967 https://doi.org/10.1007/BF02037481 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02037481 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Palágyi S. Institute of Radioecology and Applied Nuclear Techniques, P.O. Box A-41, 040 61, Kosice, (Czecho-Slovakia) aut NATIONALLICENCE 700 1- Braun T. Institute of Inorganic and Analytical Chemistry, L. Eötvös University, 112 P.O. Box 32, H-1518, Budapest, (Hungary) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 163/1(1992-11-01), 69-79 0236-5731 163:1<69 1992 163 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer