A set of model calculations is presented concerning the problem of imp
urity solvation. The methods include lattice gas, evaluated exactly as
well as in the mean-field approximation, and molecular-dynamics simul
ation. Our results are in quantitative accord with simple energy balan
ce arguments, but a solvation parameter suggested by Ancilotto, Lerner
and Cole [J. Low Temp. Phys. 101, 1123 (1995)] is found to be nonuniv
ersal. (C) 1998 American Institute of Physics.