HOLLOW-FIBER FLOW FIELD-FLOW FRACTIONATION OF POLYSTYRENE SULFONATES

Hollow-fibre flow field-flow fractionation has been used for the chara cterization and separation of sodium polystyrene sulphonates in aqueou s solutions. The elution behaviour of the polymers was found to follow theoretical predictions with a fair accuracy. Diffusion coefficients of standards of different molecular mass could be calculated from elut ion data. A method was developed to determine the polydispersity of na rrow standards by measuring peak widths under different flow regimes. Flow programming has been used to fractionate samples with a wide mole cular mass range.