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Citation: SONG Zi-Lan, CHEN Hui, LIANG Bao-Chen. Crystallization of Cobalamineand the Influence of Ionic Impurities on Its Crystal Growth[J]. Chinese Journal of Applied Chemistry, ;2009, 26(7): 860-862. shu

Crystallization of Cobalamineand the Influence of Ionic Impurities on Its Crystal Growth

1.
Tianjin University of Technology, School of Chemistry and Chemical Engineering, Tianjin 300384

Corresponding author: CHEN Hui,
Received Date: 28 July 2008
Available Online: 29 October 2008
Fund Project: 国家科技支撑计划项目(2007BAI46B04) (2007BAI46B04)

This paper presents an experimental investigation on the crystallization thermodynamics of coba-lamine by means of laser.The influences of temperature and different solvents on the solubility and supersolubility are studied.The metastable zone is also measured.It shows that the metastable zone width becomes wider with decreasing the proportion of acetone.The influences of four typical ionic impurities(Na⁺,Mg²⁺,Ca²⁺ and Fe³⁺) on cobalamine crystallization are studied.Some of crystallization products become fragmentation and agglomeration with ionic impurities existence.The surface configuration has been characterized by SEM.As a result,it shows that Fe³⁺ and Mg²⁺ have more significant effects than Na⁺ and Ca²⁺.
- cobalamine,
- dilution crystallization,
- ionic impurity
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