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J. Phys. IV France
Volume 113, January 2004
Page(s) 17 - 20

J. Phys. IV France
113 (2004) 17
DOI: 10.1051/jp4:20040004

Équilibres de phases en chromatographie micellaire. Corrélation LSER de la constante d'équilibre micelle-eau

S. Guermouche and M.H. Guermouche

Faculté de Chimie, USTHB, BP. 32 El-Alia, Bab-Ezzouar, Alger, Algérie

Micellar liquid chromatography allows to detemine micelle-water equilibrum constant KMW. Capacity factors of fifty solutes of various polarities are measured using cationic and anionic micellar mobilephase and a C 18 silica column. The solvatochromic parmeters of the solutes are used to establish a convenient LSER (linear solvation equation relationship) correlations for the capacity factors. Using the Armstrong model, the micelle-water equilibrum constant KMW of tbe solutes used are determined d'Armstrong, The LSER equations found for KMW give a a straights with a correlation coefficient higher than 0.95. For the two used surfactants, The LSER coefficients found allow to conclude that the size of the solute is the most influencial parmeter on micelle-water equilibrum constant KMW followed by the solute basicity.

© EDP Sciences 2004