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The effect of complexation additives on analyte migration behavior in capillary electrochromatography
1Department of Chemistry, University of British Columbia, Vancouver, Canada.
Electrophoresis
|August 7, 1998
Summary
This study presents a general equation for analyte migration in capillary electrochromatography (CEC), accounting for equilibria and field effects. It demonstrates how resolution relates to migration rates and analyzes the complex impact of electroosmotic flow (EOF) on separations.
Area of Science:
- Analytical Chemistry
- Separation Science
- Chromatography
Background:
- Capillary electrochromatography (CEC) involves analytes with varying mobilities and multiple equilibria.
- Understanding analyte migration and separation factors is crucial for optimizing CEC techniques.
Purpose of the Study:
- To develop a general equation describing analyte migration behavior in CEC.
- To analyze the relationship between resolution and migration rates.
- To investigate the complex effects of electroosmotic flow (EOF) on CEC separations.
Main Methods:
- Development of a general migration equation incorporating individual capacity factors.
- Mathematical analysis of analyte resolution in relation to migration rates.
- Calculation of electrophoretic mobility based on analyte fraction in the buffer.
- Discussion of EOF effects on resolution in CEC.
Main Results:
- A general equation for analyte migration in CEC is established, considering field and equilibrium effects.
- Analyte resolution is shown to have a linear correlation with the ratio of migration rates.
- The impact of EOF on CEC is more intricate than in capillary electrophoresis (CE) due to partial analyte interaction.
Conclusions:
- The developed equation provides a comprehensive model for analyte migration in CEC.
- Resolution can be predicted and potentially optimized by understanding migration rate ratios.
- Further investigation into EOF's role is essential for advancing CEC separation efficiency.