An approach was proposed to determine the solubility of pure zinc lactate at a high heating rate(20 K·h-1)

which significantly improves the efficiency of solubility measurement.The results showed a good agreement with the solubility data obtained through isothermal processes.This approach was extended to measure the solubility of zinc lactate in the presence of small amount of impurity.The influences of impurities

including malic acid

succinic acid and sodium oxalate

on the primary nucleation kinetics of zinc lactate in cooling crystallization were investigated

and a method was presented to estimate the primary nucleation kinetics based on Nyvlt theory by measuring the metastable zone width of zinc lactate at specific cooling rate in the solution.The results showed that the rate of primary nucleation of zinc lactate decreased in the presence of malic acid or succinic acid.However

when sodium oxalate was introduced in the solution

the nucleation of zinc lactate was accelerated at low supersaturation but suppressed at high supersaturation.