THE IONIZATION-CONSTANTS OF ALPHA-ALANINE IN NACL AT 25-DEGREES - EFFECT OF THE IONIC-STRENGTH BASED ON 3 MODELS

被引：21

作者：

FIOL, S ^{[1
]}

BRANDARIZ, I ^{[1
]}

DEVICENTE, MS ^{[1
]}

机构：

[1] UNIV LA CORUNA,FAC CIENCIAS,DEPT QUIM FUNDAMENTAL & IND,E-15071 LA CORUNA,SPAIN

来源：

TALANTA | 1995年 / 42卷 / 06期

关键词：

D O I：

10.1016/0039-9140(95)01484-S

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In the present work we obtained the experimental pKs of the amino acid alpha-alanine in NaCl at 25 degrees and different ionic strengths. The equilibrium constants have been potentiometrically determined with a commerical glass electrode and the results analysed through three models: two directly based on the Fitter and Scatchard approaches to the ion specific interaction theory and the other based on a simpler modification of the Debye-Huckel equation. The three models fit the data reasonably well and the extrapolated pK values obtained show a good agreement. The goodness of the ridge regression method cannot be probed in this case.

引用

页码：797 / 801

页数：5

共 26 条

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