抄録
Isotope effect on T_H (homogeneous nucleation temperature) was investigated on aqueous solutions of (CH_3) _4NC1 and DMSO. The T_H difference between the (CH_3) _4NC1-H_2O solution and the (CH_3) _4NC1-D_2O solution is about 4℃ and changes little with increasing solute concentration. It is shown that the isotope effect due to solute is very small even at high solute concentrations whereas that due to solvent is about 5℃ at dilute solute concentrations and decreases a little at high solute concentrations. It seems that the T_H difference between the DMSO-H_2O solution and the DMSO-D_2O solution apparently becomes larger with increasing pressure.
