S-腺苷-L-蛋氨酸在弱酸树脂上的离子交换平衡  

Ion-exchange equilibrium of S-adenosyl-L-methionine on weak acid resin

作　　者：刘惠[1] 林建平[1] 岑沛霖[1] 

机构地区：[1]浙江大学生物工程研究所,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2004年第1期125-128,共4页Journal of Zhejiang University：Engineering Science

摘　　要：结合Donnan膜平衡理论与树脂的弱电解质性质,在假设S-腺苷-L-蛋氨酸(SAM)分子带一价正电荷的基础上,建立了SAM在D113弱酸树脂上的离子交换平衡模型.实验测定了初始pH值为2.30、5.01、7.13及8.13时的等温离子交换平衡数据,通过实验数据拟合得到了两个模型参数.实验数据拟合结果表明,在初始pH值为5～8时,两参数的模型较好地描述了离子交换平衡.Combining Donnan equilibrium theory and the weak electrolytic property of carboxyl, a model to describe the ion-exchange equilibrium of S-adenosyl-L-methionine (SAM) on weak acid resin D113 was derived,which assuming SAM to be a positively charged ion. The ion-exchange-isotherms at initial pH values of 2.30, 5.01, 7.13 and 8.13 were measured respectively. The model parameters were correlated with experimental data, and the model was checked with the experimental data. This two parameter model described the experiments quite well for initial pH values of 5 to 8.

关 键 词：S-腺苷-L-蛋氨酸 弱酸树脂 离子交换平衡 Donnan膜平衡理论 离子交换剂 电解质 

分 类 号：O625.636[理学—有机化学] O646.1[理学—化学]