Determination of Nucleation and Growth Mechanisms of the B Polymorph of L-Histidine by Induction Time Measurement

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• 作者：Lek Wantha
• 刊名：Chemical Engineering & Technology
• 出版年：2016
• 出版时间：July, 2016
• 年：2016
• 卷：39
• 期：7
• 页码：1289-1294
• 全文大小：314K
• ISSN：1521-4125

文摘

The nucleation and growth mechanisms of the B polymorph of L-histidine (L-his) in a water-ethanol system were determined based on induction time measurements. The induction times were experimentally determined at different supersaturations and correlated using the models of mononuclear and polynuclear mechanisms. The primary nucleation mechanism of the B polymorph of L-his was identified as a polynuclear mechanism and the growth mechanism was found to be a two-dimensional nucleation-mediated growth. These mechanisms of the B polymorph of L-his will be used to characterize the polymorphic transformations and the overall crystallization rate of L-his.