Recently, measurements of a considerable portion of the phase diagram for the quaternary system water–
ethylene glycol–sucrose–NaCl were published (Han et al., 2010). In that article, the data were used to
evaluate the accuracy of two non-ideal multi-solute solution theories: the Elliott et al. form of the
multi-solute osmotic virial equation and the Kleinhans and Mazur freezing point summation model.
Based on this evaluation, it was concluded that the freezing point summation model provides more accurate predictions for the water–ethylene glycol–sucrose–NaCl system than the multi-solute osmotic virial
equation. However, this analysis suffered from a number of issues, notably including the use of inconsistent solute-specific coefficients for the multi-solute osmotic virial equation. Herein, we reanalyse the data
using a recently-updated and consistent set of solute-specific coefficients (Zielinski et al., 2014). Our
results indicate that the two models have very similar performance, and, in fact, the multi-solute osmotic
virial equation can provide more accurate predictions than the freezing point summation model depending on the concentration units used.