Representation of solid-liquid equilibrium of L-ornithine-L-aspartate plus water plus methanol system using the Chen model for mixed-solvent electrolyte solution

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Title
Representation of solid-liquid equilibrium of L-ornithine-L-aspartate plus water plus methanol system using the Chen model for mixed-solvent electrolyte solution
Author(s)
Ye Hoon Kim; Seung Joo Haam; Kee Kahhb Koo; Yong Gun Shul; Joo Hiuk Son; Joon Ki Jung
Bibliographic Citation
Journal of Chemical and Engineering Data, vol. 46, no. 6, pp. 1387-1391
Publication Year
2001
Abstract
Solubility measurements were performed in the temperature range of 298-333 K, for a methanol content varying between 0 mass % and 90 mass %. The phase equilibrium condition of L-ornithine-L-aspartate (LOLA) + water + methanol and the mean ionic activity coefficients of LOLA in a ternary system were calculated by using the Chen model, allowing the description of the mixed-solvent electrolyte systems. The mean ionic activity coefficients were calculated with nine binary parameters: six parameters for the binaries LOLA + water (taken from conductance measurements) and water + methanol (taken from the literature) and three parameters for the binary LOLA + methanol (obtained by regression of solubility data). Using binary adjustable parameters and solubility data, the model satisfactorily correlates the ternary (LOLA + water + methanol) system over the entire range of temperature and concentrations.
ISSN
0021-9568
Publisher
Amer Chem Soc
DOI
http://dx.doi.org/10.1021/je0100589
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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