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Titre du document / Document title

Solubilities of L-cystine, L-tyrosine, L-leucine, and glycine in sodium chloride solutions at various pH values

Auteur(s) / Author(s)

CARTA R. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Dipartimento di Ingegneria Chimica e Materiali Universita' di Cagliari, 09123 Cagliari, ITALIE

Résumé / Abstract

The solubilities of four amino acids (L-cystine, L-tyrosine, L-leucine, and glycine) at T = 298 K and at the pH values of 0.00, 1.00, 2.00, 11.00, 12.00, and 13.00 in water solutions of sodium chloride, have been measured. The concentration of NaCl was varied from (0.0 to 3.0) mol.dm-3. The solubility of L-cystine increased as the concentration of salt was raised from (0.0 to 3.0)mol.dm-3. For the same variation of sodium chloride concentration the solubilities of L-tyrosine and L-leucine decreased. The solubility of glycine was not influenced significantly by the presence of NaCl. A simple relation between the ratio of the solubilities of the amino acids with, and without, salt and NaCl concentration is presented. The relation predicts well the solubilities of L-cystine, L-tyrosine, L-leucine, and glycine in aqueous solutions of NaCl starting from known values of the solubilities in pure water.

Revue / Journal Title

Journal of chemical thermodynamics    ISSN  0021-9614   CODEN JCTDAF 

Source / Source

1998, vol. 30, no3, pp. 379-387 (13 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1969) (Revue)

Mots-clés anglais / English Keywords

Solubility

;

Physicochemical properties

;

α-Aminoacid

;

Organic compounds

;

Cystine

;

Sulfur containing aminoacid

;

Tyrosine

;

Leucine

;

Glycine

;

Aqueous solution

;

Sodium Chlorides

;

Medium effect

;

pH

;

Thermodynamic model

;

Mots-clés français / French Keywords

Solubilité

;

Propriété physicochimique

;

α-Aminoacide

;

Composé organique

;

Cystine

;

Aminoacide soufré

;

Tyrosine

;

Leucine

;

Glycine

;

Solution aqueuse

;

Sodium Chlorure

;

Effet milieu

;

pH

;

Modèle thermodynamique

;

Mots-clés espagnols / Spanish Keywords

Propiedad fisicoquímica

;

α-Aminoácido

;

Cistina

;

Aminoácido azufrado

;

Tirosina

;

Leucina

;

Glicina

;

Solución acuosa

;

Cloruro

;

Efecto medio

;

Modelo termodinámico

;

Localisation / Location

INIST-CNRS, Cote INIST : 14300, 35400007545529.0080

Nº notice refdoc (ud4) : 2215822



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