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Activity coefficients of electrolyte and amino acid in the systems (water  +  potassium chloride  + dl -valine) at T = 298.15 K and (water  +  sodium chloride  + l -valine) at T =  308.15 K

✍ Scribed by A. Khavaninzadeh; H. Modarress; V. Taghikhani; M.K. Khoshkbarchi

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 139 KB
Volume: 34
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.2002.0959

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✦ Synopsis

The activity coefficient data were reported for (water + potassium chloride + DL-valine) at T = 298.15 K and (water + sodium chloride + L-valine) at T = 308.15 K. The measurements were performed in an electrochemical cell using ion-selective electrodes. The maximum concentrations of the electrolytes and the amino acids studied were 1.0 molality and 0.4 molality, respectively. The results of the activity coefficients of DL-valine are compared with the activity coefficients of DL-valine in (water + sodium chloride + DL-valine) system obtained from the previous study. The results show that the presence of an electrolyte and the nature of its cation have a significant effect on the activity coefficient of DL-valine in aqueous electrolyte solutions.

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✦ Synopsis

Activity coefficients of electrolyte and amino acid in the systems (water + potassium chloride + dl -valine) at T = 298.15 K and (water + sodium chloride + l -valine) at T = 308.15 K