Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Influence of fructose on the diffusion of potassium hydrogen phosphate in aqueous solutions at 25 degC

Verissimo, L. M. P.[Luis M. P.], Teigao, J. M. M.[Joana M.M.], Ramos, M. L., Burrows, H. D.[Hugh D.], Esteso, M. A.[Miguel A.], Ribeiro, A. C. F.[Ana C. F.]
J. Chem. Thermodyn. 2016, 101, 245-250
ABSTRACT
Diffusion coefficients have been measured at 25 C for potassium hydrogen phosphate (K2HPO4, 0.101 mol kg 1) in aqueous solutions containing various concentrations of fructose from (0.001 to 0.101) mol kg 1, using a conductimetric cell (the Lobo cell) coupled to an automatic data acquisition system. Significant effects of fructose were observed on the diffusion of K2HPO4 in these mixtures, which are attributed to the interaction between HPO4 2 anion (or other protonated forms) and fructose. Support for this comes from 1H and 13C NMR spectroscopy, which are compatible with binding between the anomeric forms of D-fructose and the HPO4 2 anion.
Compounds
# Formula Name
1 HK2O4P dipotassium hydrogen phosphate
2 C6H12O6 D-fructose
3 H2O water
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 2
  • 3
  • 1
  • Binary diffusion coefficient, m2/s ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • Open capillary
  • 6