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ժҪ ��ü��ⷨ�ⶨ��L-˿��ˮ�е��ܽ��,��,L-˿��ˮ�Ͼ��ˮ�Ͼ��ľ��ת��¶�Ϊ309.14 K,��ڴ��¶�ʱ,��ˮ�ﾧ��ȶ��,��ڴ��¶�ʱ,ˮ��ﾧ��ȶ��ġ��PVM��FBRM��L-˿��ˮ��Һ��ȴ�ᾧ��̺;��ת��е�ʵʱ��,�ڸ��ǰ�״��ˮ��L-˿��ᾧ��,��ȴ��ת��¶��ʱ,��״��ת��Ϊ��Ƭ״��ˮ�Ͼ��塣��ת��Ϊ��Ҫ��ڵ��L-˿��ˮ��ӵ��ö��γ�ˮ�Ͼ��йء�

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Abstract�� The solubility of L-Serine in water was measured by laser method.The experimental results show that the transition temperature of the two morphologies of L-serine,anhydrous and monohydrate crystals,is 309.14 K,upon which the anhydrous crystal is stable,while under which the monohydrate crystal is stable.The cooling crystallization and the polymorphic transition processes of L-Serine in aqueous solution were real time monitored by PVM and FBRM.The results show that at a higher temperature,the anhydrous crystals form in club-shaped habit,while the temperature of the slurry was cooled under the polymorphic transition temperature,the club-shaped anhydrous crystals would translate to the hexagonal plate-shaped monohydrate crystals.This translation behavior related to the fact that the monohydrate crystal can form easily due to the hydrogen bonds between the moleculars of L-Serine and water at lower temperature

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Received 2008-03-15; published 2008-03-15

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��;��;��;��;.L-˿��ˮ��Һ�еļٶྦྷ��Ϊ[J]. ��ѧ��ҵ�빤��, 2008,25(2): 129-133

LI Xia,YIN Qiu-xiang,HU Yang,WANG Jing-kang.Pseudo-Polymorphic Behavior of L-Serine in Aqueous Solution[J]. Chemcial Industry and Engineering, 2008,25(2): 129-133

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