Additivity Rule Holds in Supercooling of Aqueous Solutions

Homogeneous ice nucleation temperatures ( T H ) of aqueous solutions of methanol, ethylene glycol, glycerol, xylitol, poly(ethylene glycol)s, glucose, and fructose were measured as a function of solute concentration. It is shown that the additivity rule holds fairly well for the T H values of the solutions of the same chemical family. Contrary to the conclusion by Koop et al. (ref 11), T H depends strongly on the nature of a solute. It is confirmed that there is a linear relation between T H and melting temperature ( T m ) of the solution (solute: methanol, ethylene glycol or glycerol) up to high solute concentrations.