Fraction transfer process in on-line comprehensive two-dimensional liquid-phase separations

Area of Science:

• Analytical Chemistry
• Separation Science

Background:

• Two-dimensional liquid-phase separations are increasingly vital for analyzing complex mixtures.
• On-line approaches are favored for automation, high throughput, and minimizing sample contamination.

Purpose of the Study:

• To review the on-line coupling of liquid chromatography (LC) and capillary electrophoresis (CE) in two-dimensional (2D) systems.
• To discuss the critical aspects of fraction transfer, interfaces, and compatibility in 2D LC-CE systems.

Main Methods:

• Review of existing literature on on-line 2D LC-CE methodologies.
• Analysis of interfaces, experimental setups, and instrumental parameters for fraction transfer.
• Evaluation of compatibility issues between LC and CE separation systems.

Main Results:

• On-line coupling of LC and CE offers significant advantages for complex sample analysis.
• Fraction transfer optimization is crucial for effective interfacing and system performance.
• Electromigration separations present unique benefits and challenges when coupled with LC.

Conclusions:

• On-line 2D LC-CE systems provide a powerful platform for high-performance separations.
• Careful consideration of interfaces and system compatibility is essential for successful implementation.
• This approach enhances analytical capabilities for complex samples.