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.