Abstract

The authors have investigated the chromatography of polyethylene glycols on crosslinked copolymer Solose K sorbents with varied hydrophobic-hydrophilic properties. The experimental data as a whole are described by the theoretical dependences of the distribution coefficient on M. It is proposed that the chromatographic regime be characterized by the parameter of adsorption interaction τ, a measure of the deviation of the system from critical conditions. The critical conditions are found delineating the regimes of exlusion and adsorption chromatography. It is shown that the transition from exlusion to adsorption comes about with increase in the content in the sorbent of the hydrophobic components and for sorbents with fixed composition with fall in pH or with rise in temperature. It is concluded that the hydrophobic effects play a determinant role on adsorption in the polyethylene glycol-Solose K systen,.

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