氨基酸在水溶液中的扩散系数
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朱春英;马友光;赵长伟;何明霞;马沛生;余国琮
天津大学化工学院,化学工程联合国家重点实验室,天津 300072
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Diffusion coefficients of amino acids in aqueous solutions
ZHU Chunying;MA Youguang;ZHAO Changwei;HE Mingxia;MA Peisheng;YU Guocong(K.T.Yu)
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Abstract: There are still limited experimental data of liquid diffusion coefficients in literature.Therefore, the experimental investigation and prediction model are of practical and theoretical significance.The diffusion coefficients of L-serine, L-threonine,L-arginine,in aqueous solution at 298.15 K were measured respectively by holographic interferometer.The affecting factors of molecular structure and polarity were analyzed and discussed.Finally, a modified semi-empirical model for correlating the diffusion coefficients of solid organic compounds in aqueous solutions at 298.15 K was proposed with an adjustable parameter added.The average deviation between model prediction values and experimental ones is less than 0.2%, which shows a considerably satisfactory accuracy.
朱春英;马友光;赵长伟;何明霞;马沛生;余国琮.
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https://hgxb.cip.com.cn/CN/Y2005/V56/I2/243