3D printed device for epitachophoresis.

Area of Science:

• Analytical Chemistry
• Biotechnology
• Materials Science

Background:

• Polyacrylamide and agarose gels are standard media in electrophoresis but can deform in discontinuous buffer systems.
• Epitachophoresis requires stable anticonvection media to prevent liquid flow during electromigration.
• Existing gel media pose challenges in epitachophoresis due to potential deformation and mixing.

Purpose of the Study:

• To explore 3D printing for creating rigid stabilizing manifolds as a gel substitute in epitachophoresis.
• To develop a device that minimizes liquid flow and prevents electrolyte mixing during separation.
• To enhance the concentration and separation of milliliter sample volumes using a novel approach.

Main Methods:

• Utilized stereolithography technique with low water-absorbing resin for 3D printing.
• Designed and tested various geometries of 3D printed stabilizing manifolds.
• Employed the printed manifolds as replaceable composite structures to prevent electrolyte mixing.

Main Results:

• Achieved analyte focusing from 3-4 mL sample volumes down to 150 μL or less.
• Demonstrated enrichment factors ranging from 20 to 27 with a 150 μL collection cup.
• Concentration times ranged from 15 to 25 minutes, dependent on stabilization media and power.

Conclusions:

• 3D printed stabilizing manifolds offer a robust and effective alternative to traditional gels in epitachophoresis.
• The developed device significantly improves analyte concentration efficiency for large sample volumes.
• This 3D printing approach provides a versatile solution for stabilizing electrophoretic separations and preventing buffer mixing.