About the Metastable Zone Width of Primary and Secondary Nucleation

Solubility and Seeded Metastable Zone width of functional sugar L-arabinose

“…A possible reason is that the solubility of L-arabinose increases due to the addition of potassium chloride, which would reduce the effective supersaturation. Another reason is that impurities can change the nucleation rate by affecting both the kinetic factor and interfacial energy (Sangwal, 2009;Herden et al, 2001). The findings obtained in the present study are similar to those in Dhanaraj's research, who found that adding K + ion increased the MSZW of KDP thus making the solution more stable and inhibiting spontaneous nucleation (Dhanaraj et al, 2008).…”

“…Deviation = 27.11± 2.34), which might be explained by the following reasons. Firstly, MSZW is a function of the induction time of nucleation (t ind ) and cooling rate (Zhang et al, 2012;Herden et al, 2001;Kobari et al, 2010;Kim & Mersmann, 2001;Sangwal, 2011). It has been pointed out that log (ΔT m ) increased linearly with an increase in log R (cooling rate).…”

“…Therefore, the log R was not constant, but it changed which resulting in the deflection of MSZW. Secondly, the size and number of the seed crystals influences the MSZW of secondary nucleation (Herden et al, 2001). Thus, a large crystal was suspended in the solution.…”

A perspective on a century of inert seeds in crystallisation

“…Crystallising solutions of at least † 24 substances including ammonium alum, 2 ammonium oxalate, 2 ammonium perchlorate, 3 ammonium sulfate, 4 lead nitrate, 5 magnesium sulfate heptahydrate, [6][7][8][9][10][11][12] nickel ammonium sulfate hexahydrate, 13 potassium alum, 2,[14][15][16][17][18][19] potassium bromide, 20 potassium chloride, 3,[18][19][20][21] potassium iodide, 18 potassium nitrate, [22][23][24][25][26] potassium sulfate, 9,10,27,28 sodium bromate, 29 sodium chlorate, 2,3,30 sodium chloride, 31,32 sodium nitrate, 2,4,[33][34][35] sodium perborate, 36 sodium thiosulfate, 2 aspartic acid, 17 citric acid, 37 glutamic acid,…”

“…The phenomenon often manifests itself in a supersaturated solution as a period after the first sudden appearance of turbidity, or crystals, [2][3][4]6 during which time the system is quiescent until the onset of a massive crystallisation event. That so many substances can display the phenomenon suggests that it is at least a common facet of crystallisation, perhaps involving a universal mechanism.…”