the results for ca-heparin/cacl2 mixtures when corrected for small ion-small ion interactions give a surprisingly good fit to the theoretical counter ion activity coefficient for a divalent counter ion/divalent cation simple electrolyte system , for values of x ( x = the polyanion/co-ion ratio ) up to 4 , with slight deviations for values of x > 4 .
C0013832
electrolyte
C0022023
ion