Effect of impurities on the metastable zone width of solute–solvent systems

Sangwal, K.

doi:10.1016/j.jcrysgro.2009.06.045

Cited by 55 publications

(42 citation statements)

References 22 publications

(77 reference statements)

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“…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).…”

Section: Detection Of Mszw In Impure Water Systemmentioning

confidence: 99%

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

Hu¹,

Huang²,

Zhang³

et al. 2015

Food Sci. Technol (Campinas)

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L-arabinose is widely used in food, medicine, chemistry, and biology fields; however, solubility and seeded metastable zone width (MSZW) of L-arabinose have not been reported in the literature. In this paper, solubility and MSZW of L-arabinose in aqueous solution were determined. Solubility of L-arabinose was measured in the range of 20-68 °C by a conventional equilibrium solubility method and quantitation was determined using the ion chromatography technique. Seeded MSZW was determined in the range of 51-73% by the calorimetric method. The effect of two salts (potassium chloride and calcium chloride) on the solubility and MSZW of L-arabinose were also evaluated. Results showed that both potassium chloride and calcium chloride increased the solubility of L-arabinose, and this increase was intensified with temperature rise. The MSZW of L-arabinose was not constant but a spread. Potassium chloride increased the MSZW of L-arabinose. However, the effect of calcium chloride on MSZW of L-arabinose was concentration dependent. Conclusion: the L-arabinose solubility increased with the increase in temperature, and both potassium chloride and calcium chloride increased the solubility of L-arabinose in aqueous solution. The seeded MSZW of L-arabinose is not a constant; it increases in the presence of potassium chloride and varies with the change in calcium chloride concentration.

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Section: Detection Of Mszw In Impure Water Systemmentioning

confidence: 99%

“…By acting as a nucleation enhancer, it would decrease the MSZW of the solute, whereas as a nucleation inhibitor, it would increase the MSZW of the solute. (Sangwal, 2009). However, the influence of calcium chloride on the seeded MSZW of L-arabinose by modifying the nucleation rate has not been proved yet.…”

Section: Detection Of Mszw In Impure Water Systemmentioning

confidence: 99%

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

Hu¹,

Huang²,

Zhang³

et al. 2015

Food Sci. Technol (Campinas)

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“…Figure shows a noticeable decrease in the MSZW with the addition of Ca 2+ ions. The effect of Ca 2+ ions can be well described by the Sangwal's approach, which is based on the Nyvlt's power‐law equation and the classical theory of three‐dimensional (3D) nucleation .

{((), T_{0} / Δ T_{trueprefixmax})}^{2} = F (1 - Z ln R)

where

F = \frac{1}{Z B} {((), \frac{Δ H_{S}}{R_{G} T_{trueprefixlim}})}^{2}, Z = ln (\frac{f}{A T_{0}} \frac{Δ H_{S}}{R_{G} T_{trueprefixlim}})

where △ H s is the enthalpy of solution, kJ·mol −1 ; R G is the gas constant, 8.314 J·(mol·K) −1 ; f is the Nyvlt's proportionality constant, nuclei number·m −3 , A is the kinetic parameter, associated with the kinetics of the nuclei formation in the growth medium, and B is the thermodynamic parameter, i.e.…”

Section: Resultsmentioning

confidence: 99%

Metastable zone width of SrCl₂·6H₂O during cooling crystallization

Qian

Sun

et al. 2013

Crystal Research and Technology

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The metastable zone width (MSZW) of SrCl2·6H2O during cooling crystallization was determined by the focused beam reflectance measurement (FBRM). The effects of the saturation temperature, cooling rate, stirring rate, and Ca2+ ion impurity on the MSZW were investigated. The MSZW increased with the increase in the cooling rate and decreased with the increase in the saturation temperature, stirring rate, and Ca2+ ion concentration. Moreover, the effect of seed crystals on the MSZW was investigated, where two types of seeds were used, namely, seed 1# and 2# with volume mean crystal sizes of 64 and 218 µm, respectively. The seeded MSZW decreased than the unseeded one. The MSZW of seed 1# was greater than that of seed 2# when the same amount of seed was used. The MSZW of seed 1# increased with the increase in the seed loading, whereas that of seed 2# decreased.

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“…Based on the Nyvlt's approach [11,12], Sangwal [13][14][15][16] proposed a self-consistent Nyvlt-like equation using the power-law nucleation rate, leading to a linear relationship between ln ∆T m T 0 and lnb, where T 0 is the initial saturated temperature, ∆T m is the MSZW, and b is the cooling rate. Similarly, using the nucleation rate based on CNT, Sangwal [13][14][15][16] developed a linear relationship of T 0 ∆T m 2 versus lnb. Kashchiev et al [17] presented a general expression for the total volume and number of crystallites as functions of the cooling rate for progressive nucleation based on CNT.…”

Section: Introductionmentioning

confidence: 99%

A Linear Regression Model for Determining the Pre-Exponential Factor and Interfacial Energy Based on the Metastable Zone Width Data

Shiau

2020

Crystals

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A linear regression model is presented in this study to determine the pre-exponential factor and interfacial energy of the crystallized substance based on classical nucleation theory using the metastable zone width data. The nucleation event is assumed corresponding to a point at which the total number density of the nuclei has reached a fixed (but unknown) value. One equation is derived for any temperature-dependent functional form of the solubility. Another equation is derived for the van't Hoff solubility expression. The pre-exponential factor and interfacial energy obtained from these two equations are found consistent for the studied systems, including glutamic acid, glycine, and 3-nito-1,2,4-triazol-5-one. The results obtained from these two equations are also compared with those obtained from the integral method and classical 3D nucleation theory approach.

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Effect of impurities on the metastable zone width of solute–solvent systems

Cited by 55 publications

References 22 publications

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

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

Metastable zone width of SrCl₂·6H₂O during cooling crystallization

A Linear Regression Model for Determining the Pre-Exponential Factor and Interfacial Energy Based on the Metastable Zone Width Data

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Effect of impurities on the metastable zone width of solute–solvent systems

Cited by 55 publications

References 22 publications

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

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

Metastable zone width of SrCl2·6H2O during cooling crystallization

A Linear Regression Model for Determining the Pre-Exponential Factor and Interfacial Energy Based on the Metastable Zone Width Data

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Product

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Metastable zone width of SrCl₂·6H₂O during cooling crystallization