STUDY OF THE EFFECT OF IONIC-STRENGTH ON THE 2ND PROTONATION EQUILIBRIUM OF SIMPLE AMINO-ACIDS BY USE OF A QUASI-LATTICE MODEL

Authors
VILARINO T FIOL S ARMESTO XL BRANDARIZ I DEVICENTE MES
Citation
T. Vilarino et al., STUDY OF THE EFFECT OF IONIC-STRENGTH ON THE 2ND PROTONATION EQUILIBRIUM OF SIMPLE AMINO-ACIDS BY USE OF A QUASI-LATTICE MODEL, Zeitschrift für physikalische Chemie, 199, 1997, pp. 69-76
Citations number
33
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Zeitschrift für physikalische Chemie → ACNP
ISSN journal
09429352
Volume
199
Year of publication
1997
Part
1
Pages
69 - 76
Database
ISI
SICI code
0942-9352(1997)199:<69:SOTEOI>2.0.ZU;2-O
Abstract
The effect of the ionic strength on the second acid-base equilibrium c onstant of various aminoacids was analysed by use of a quasi-lattice m odel for log gamma(+/-), over the ionic strength range 0.1-1.5 M. Such treatment provides an alternative to empirical or semi-empirical equa tions based on modified versions of Debye-Huckel limiting law obtained by including different ionic strength terms. An interpretation of the minimum of the curve in terms of the model employed is also given.