Estimation of the Binding Constant of Sugar Alcohol to Sodium Ion by Using Its Apparent Distribution Coefficients to Cation-exchange Resins with Different Cross-linkages

The apparent distribution coefficients, Kapp, of some sugar alcohols to cation-exchange resins in the sodium-ion form and with divinylbenzene (DVB) contents 2, 4, 6, 8% were measured at 25ºC. Assuming that binding constant, B, ribitol sodium ion was zero, swelling pressures, Π, DVB 8％ estimated be 3.2, 9.4, 12.3, 25.7 MPa, respectively. From these Π values Kapp values, B each alcohol calculated. Because value is independent degree cross-linking resin, obtained from for different averaged. Erythritol sorbitol had almost zero affinity ion. Among tested alcohols, order xylitol > d-arabitol, l-arabitol mannitol.