3.4 Nucleation induction period and surface tension measurement.
Apparatus in section 3.3 was also used to measure the nucleation induction period. t ind in which the presence of the membrane and the absence of the membrane were tested at different stirring speeds. Induction period at different supersaturations based on different initial concentrations was measured based on the same initial concentration to determine the crystallization solution’s surface tension. Different saturated thiourea solutions were placed in a water bath and rapidly cooled. Nucleation induction period was recorded and fitted to calculate the relevant surface tension with the classic method49.