Effect of solutes on the heterogeneous nucleation temperature of supercooled water: an experimental determination.
We investigate the effect of solute concentration on the heterogeneous ice nucleation temperature (T(het)) of aqueous solutions of both NaCl and d-glucose. An automatic lag time apparatus (ALTA) technique allows the dependence of T(het) on solute concentration to be determined with statistical significance. Our results point to the solute-induced lowering of T(het) being a factor of two times the equivalent melting point depression at any fixed concentration, the same factor reported for homogeneous nucleation experiments with small molecular weight solutes.
Scripps Institution of Oceanography, UC San Diego, 9500 Gilman Drive, CA 92093, USA. pwilson@coast.ucsd.edu
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Wilson
A D J
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Haymet