Ternary mutual diffusion coefficients (D11, D22, D12 and D21) measured by the Taylor dispersion method are reported for aqueous solutions of {levodopa (L-dopa) + HCl} solutions at 25 C and HCl concentrations up to 0.100 mol dm 3. The coupled diffusion of L-dopa (1) and HCl (2) is significant, as indicated by large negative cross-diffusion coefficients. D21, for example, reaches values that are larger than D11, the main coefficient of L-dopa. Combined Fick and Nernst Planck equations are used to analyze the proton coupled diffusion of L-dopa and HCl in terms of the binding of H+ ions to L-dopa and ion migration in the electric field generated by L-dopa and HCl concentration gradients.
Compounds
#
Formula
Name
1
C9H11NO4
L-3,4-dihydroxyphenylalanine
2
H2O
water
3
ClH
hydrogen chloride
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.