Stability of continuous flow electrophoresis

Area of Science:

• Analytical Chemistry
• Separation Science
• Biotechnology

Background:

• Continuous flow electrophoresis (CFE) is a powerful separation technique.
• Assessing the long-term stability of CFE is crucial for its practical application.
• Previous studies suggest stable electrophoretic regimes are achievable with specific electrolyte systems.

Purpose of the Study:

• To evaluate the operational stability of continuous flow electrophoresis (CFE).
• To determine if CFE can be reliably used for extended analytical procedures, such as overnight runs.
• To validate the stability of a specific CFE setup using cationic isotachophoresis.

Main Methods:

• Performed uninterrupted continuous flow cationic isotachophoresis for 15 hours.
• Utilized a model sample of two synthetic isoelectric point (pI) markers.
• Introduced sample and electrolytes via 10 inlets into the CFE chamber.
• Collected 96 fractions from 96 outlets at regular intervals for photometric scanning.

Main Results:

• Photometric scanning of collected fractions confirmed a stable separation.
• The continuous flow electrophoresis system maintained its performance over the 15-hour duration.
• The operational electrolyte system and stream arrangement facilitated a stable electrophoretic regime.

Conclusions:

• Continuous flow electrophoresis (CFE) exhibits sufficient stability for overnight operation.
• The validated CFE method is suitable for long-term analytical separations.
• This study provides evidence for the robustness of CFE in demanding experimental conditions.