Separation of proteins by reversed-phase high-performance liquid chromatography. I. Optimizing the column

Area of Science:

• Analytical Chemistry
• Chromatography
• Biochemistry

Background:

• Development of a novel analytical technology, chromatophoresis, coupling reversed-phase high-performance liquid chromatography (HPLC) with sodium dodecyl sulfate polyacrylamide gel electrophoresis.
• Need for improved resolution in the initial HPLC separation step for the chromatophoresis process.
• Existing HPLC methods required optimization for enhanced performance in the integrated system.

Purpose of the Study:

• To optimize the HPLC column for improved separation in the chromatophoresis analytical technology.
• To evaluate different column packings and dimensions for enhanced resolution and sample recovery.
• To minimize artifacts such as 'ghosting' in the HPLC separation.

Main Methods:

• Optimization of reversed-phase HPLC columns.
• Utilized polymeric (polystyrene) stationary phases with 5-micron particle size and 300-Angstrom pore size.
• Tested column dimensions of 50 x 1.0 mm internal diameter (I.D.) at flow rates of 10-100 microliters/min.

Main Results:

• Polymeric (polystyrene) packings demonstrated superior performance compared to other tested materials.
• Achieved enhanced resolution, improved sample recovery, and significant minimization of 'ghosting'.
• Identified optimal column dimensions (50 x 1.0 mm I.D.) for the specific flow rate requirements.

Conclusions:

• The optimized HPLC column significantly enhances the resolving power for the first-dimension separation in chromatophoresis.
• Polymeric packings are highly effective for improving the overall performance of the analytical system.
• The findings provide a foundation for further development and application of the chromatophoresis technology.