Influence of potassium chloride on diffusion of 2-hydroxypropyl-β cyclodextrin and β-cyclodextrin at T = 298.15 K and T = 310.15 K

Ternary mutual diffusion coefficients measured by the Taylor dispersion method (D11, D22, D12 and D21) are reported for two aqueous systems, that is, potassium chloride and 2-hydroxypropyl-β-cyclodextrin (HP-βCD), and potassium chloride and β-cyclodextrin (βCD) at T = 298.15 K and T = 310.15 K, and at carrier concentrations from (0.000 to 0.010) mol·dm−3 for each solute. Based on these data, some conclusions about the influence of KCl on the diffusion of the cyclodextrins (HP-βCD and βCD) were made, and the association constants of the complexes formed between the two components for each system (KCl and βCD, and KCl and HP-βCD) were estimated.

► Ternary diffusion coefficients for the systems KCl/βCD/H2O and KCl/HP-βCD/H2O. ► Influence of the KCl on diffusion of some cyclodextrins in the aqueous media. ► Estimation of the association constants of the complexes KCl/βCD and KCl/HP-βCD.