Gel ion exchangers

The separation of biological molecules from complex mixtures requires the use of high resolution techniques. It is, however, not normally practical to separate such molecules on conventional ion exchange materials because the molecules cannot penetrate the resin matrix, even if cross-linking is as little as 1%. Most of the exchange sites are therefore inaccessible and, since the molecules do not use the full exchange capacity of the material, the separation is very inefficient. 

Ion exchange gels are used and handled in much the same way as the unmodified gels, combined with some of the techniques used for conventional 

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Ion Exchange Resins - Spectra/Gel Ion Exchange resins are ion exchange media for use in low-pressure liquid chromatography. They are based on a polystyrene/divinylbenzene support and are available for both anion and cation exchange applications. This site will give you a reasonable... 

Hi) Ion-exchange Gels Ion-exchange derivatives of the polysaccharide, dextran, with carboxymethyl (-CH2 COO-), diethylaminoethyl [-C2H4N+H... 

J.J. Pellegrino, M.M. Ko, R. Nassimbene and M. Einert, Selective transport of C02 and H2S using facilitated transport in gel ion-exchange membranes, Gas Separation Technology, ed. E.F. Vansant and R. Dewolfs, Elsevier Science Publishers, B.V Amsterdam. 

Gel ion exchangers based on dextran have proved particularly useful since, due to their hydrophilic character and low adsorptivity, they have little... 

Seshadri T., Kettmpt A. S)mthesis and characterization of silica gel ion-exchanger bearing 2-amino-l-cyclopentene-l-dithio-carboxylic acid (ACDA) as chelating compound, Presenius Zeitschrift fiir analytische Chemie 1982 310,1-5. 

The use of a sensor with a solid-phase reactor in the same cell minimizes the analyte dispersion. The solid bed (resin or a gel ion exchange) contains the immobilized reagent or can be used to retain the analyte, either directly or after forming a complex or an ion-paired compound, which is retained. These... 

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