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Advances in capillary electrochromatography
L A Colón1, K J Reynolds, R Alicea-Maldonado
1Department of Chemistry, State University of New York at Buffalo, 14260-3000, USA. lacolon@acsu.buffalo.edu
Electrophoresis
|February 10, 1998
Summary
Capillary electrochromatography (CEC), a hybrid of capillary electrophoresis and HPLC, uses electric fields for solute transport in columns. This technique offers separation through partitioning, electromigration, or combined mechanisms, with various practical approaches detailed.
Area of Science:
- Analytical Chemistry
- Separation Science
Background:
- Capillary electrochromatography (CEC) is an emerging separation technique combining principles of capillary electrophoresis (CE) and high-performance liquid chromatography (HPLC).
- CEC utilizes an electrically driven flow to move analytes through a packed or monolithic column, offering unique separation capabilities.
Purpose of the Study:
- To present the fundamental principles of Capillary Electrochromatography (CEC).
- To provide a literature overview of diverse practical methodologies employed in CEC.
- To highlight the growing popularity and utility of CEC in analytical separations.
Main Methods:
- Electrically driven flow for solute transport within a chromatographic column.
- Separation mechanisms including differential partitioning between stationary and mobile phases.
- Separation mechanisms including differential electromigration of charged analytes.
Main Results:
- Demonstration of CEC's hybrid nature, integrating electrophoretic and chromatographic separation principles.
- Overview of various practical approaches and their effectiveness in CEC applications.
- Confirmation that separation can be achieved via partitioning, electromigration, or a combination of both.
Conclusions:
- Capillary electrochromatography offers a versatile platform for chemical separations.
- The combination of electrophoretic and chromatographic forces provides unique separation selectivity.
- CEC presents a valuable alternative or complementary technique to traditional HPLC and CE.