Spiral coils for counter-current chromatography using aqueous polymer two-phase systems.

Area of Science:

• Separation Science
• Biochemical Engineering
• Chromatography

Background:

• Aqueous two-phase systems (ATPS) are utilized in various separation processes.
• Efficient retention of the stationary phase is crucial for effective chromatography.
• Spiral coil devices offer unique geometries for continuous separation methods.

Purpose of the Study:

• To evaluate the retention properties of polyethylene glycol-phosphate ATPS in a spiral coil.
• To compare performance in an elution mode with the lower phase as the mobile phase.
• To assess the potential for protein separation using this chromatographic setup.

Main Methods:

• Utilized Type-J synchronous counter-current chromatographic devices with a 5 mm I.D. spiral coil.
• Employed digital imaging under stroboscopic illumination for analysis.
• Measured displaced stationary phase volume to quantify retention.

Main Results:

• Achieved high and stable stationary phase retention within the spiral coil.
• Observed stable performance at mobile phase flow rates up to 64 ml/min.
• Identified wave-like interface disturbances near the proximal point.

Conclusions:

• Polyethylene glycol-phosphate ATPS demonstrate robust retention in spiral coil chromatography.
• The system shows promise for efficient protein separation applications.
• Further analysis of interface dynamics may optimize separation performance.