Retention mechanisms in micellar liquid chromatography
M J Ruiz-Angel1, S Carda-Broch, J R Torres-Lapasió
1Department of Analytical Chemistry, University of Valencia, c/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain.
Journal of Chromatography. A
|October 8, 2008
Summary
Micellar liquid chromatography (MLC) offers unique advantages over traditional RPLC by utilizing surfactant micelles in the mobile phase. This review details MLC
Area of Science:
- Analytical Chemistry
- Chromatography
Background:
- Reversed-phase liquid chromatography (RPLC) traditionally uses hydro-organic mobile phases.
- Micellar liquid chromatography (MLC) employs mobile phases with surfactants above their critical micellar concentration (CMC).
- MLC modifies the stationary phase and mobile phase, enabling diverse solute interactions.
Purpose of the Study:
- To review retention mechanisms in micellar liquid chromatography (MLC).
- To explore solute interactions with stationary and mobile phases in MLC.
- To discuss mechanistic models and specific phenomena in MLC.
Main Methods:
- Analysis of diverse solute retention behaviors under various MLC conditions.
- Application of mechanistic models to describe solute interactions.
- Examination of factors influencing retention, including surfactant type, salt, organic solvent, and pH.
Main Results:
- MLC provides unique retention and selectivity due to hydrophobic, ionic, and steric interactions.
- Mechanistic models satisfactorily explain retention behavior and quantify interactions.
- Observed phenomena include suppressed silanol activity and retention of ionizable compounds.
Conclusions:
- MLC is a valuable alternative or complement to classical RPLC.
- Understanding MLC retention mechanisms is crucial for method development.
- The technique offers advantages for analyzing a wide range of solutes.
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