Chromatographic study of gemini surfactants.

Title: Chromatographic study of gemini surfactants.
Identifier: AAI9917657
identifier: 9917657
Creator: Guo, Lin.
Contributor: Adviser: P. Gary Mennitt
Date: 1999
Language: English
Publisher: City University of New York.
Subject: Chemistry, Analytical | Chemistry, Inorganic
Abstract: The application of ion-interaction reversed-phase chromatography to ionic surfactants including three series of gemini surfactants and a series of alkanesulfonates has been demonstrated in this work. The satisfactory RP-HPLC analysis was obtained using 33 x 4.6 mm C18 columns, direct or indirect UV detection, and ion-interaction reagents.;The retention mechanism has been studied by using designed experiments and thermodynamic considerations. The results indicate that no matter what kind of ion-interaction reagents is used there are no tightly bonded ion-pairs, even though the analyte and the ion-interaction reagent co-elute. The oppositely charged ions are separated by the solvent molecules.;The linear correlations between log CMC and log k ' or pC20 and log k '' have been explored. These linear relationships exist when the surface and micellar properties of a series of surfactants follow the regularity with the increment of the carbon number in the straight alkyl chain. This work provides a supplementary method to the determination of CMC and pC20 values.
Type: dissertation
Source: PQT Legacy CUNY.xlsx
degree: Ph.D.