Measurement and Correlation on Liquid DifFusion Coefficients of Aqueous L-Threonine Solutions from 298.15K to 328.15 K  

作　　者：赵长伟 马沛生 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

出　　处：《Chinese Journal of Chemical Engineering》2004年第2期267-271,共5页中国化学工程学报（英文版）

基　　金：Supported by the Educational Ministry Doctor Foundation of China (No. 2000005608).

摘　　要：The diffusion coefficients of aqueous L-threonine solutions were determined from 298.15 K to 328.15 K by the metallic diaphragm cell method with accuracy, promptness and convenience. Meanwhile, the densities and viscosities of the solutions were also determined and correlated. Based on a semi-empirical model for correlating the diffusion coefficients of some amino acids in their aqueous solutions, a new semi-empirical model for correlating the diffusion coefficients involving temperature was provided, which is more comprehensive and less experiment dependent compared to the previous model. The fitting results are satisfactory. Compared to a former model for correlating the diffusion coefficients of solid organic salts in their aqueous solutions, this model provides significant improvement in correlation of diffusion coefficients with different temperatures avoiding arduous work.The diffusion coefficients of aqueous L-threonine solutions were determined from 298.15K to 328.15K by the metallic diaphragm cell method with accuracy, promptness and convenience. Meanwhile, the densities and viscosities of the solutions were also determined and correlated. Based on a seml-empirical model for correlating the diffusion coefficients of some amino acids in their aqueous solutions, a new semi-empirical model for correlating the diffusion coefficients involving temperature was provided, which is more comprehensive and less experiment dependent compared to the previous model. The fitting results are satisfactory. Compared to a former model for correlating the diffusion coefficients of solid organic salts in their aqueous solutions, this model provides significant improvement in correlation of diffusion coefficients with different temperatures avoiding arduous work.

关 键 词：L-THREONINE diffusion coefficient metallic diaphragm cell method semi-empirical model 

分 类 号：O642[理学—物理化学]