Pooling control in variable preparative chromatography processes.

Area of Science:

• Biotechnology
• Chemical Engineering
• Analytical Chemistry

Background:

• Preparative chromatography requires precise pooling strategies due to sensitivity to process variations.
• High-load chromatographic columns demand robust control to maintain product purity and yield.

Purpose of the Study:

• To develop and validate a novel pooling control strategy for preparative chromatography.
• To identify critical process parameters affecting product purity and optimize fraction pooling.
• To enhance yield and robustness in protein purification processes.

Main Methods:

• Model-based sensitivity analysis to identify critical process parameters.
• Development of robust fixed and variable cut point strategies for pooling.
• Utilizing direct and UV detector-based indirect measurements as control signals.
• Demonstration on hydrophobic interaction and reversed phase chromatography case studies.

Main Results:

• Significant yield improvements were observed: 88.18% to 92.88% in hydrophobic interaction chromatography.
• Yield increased dramatically from 35.15% to 76.27% in sensitive reversed phase chromatography.
• The new strategy demonstrated robustness against variations in critical process parameters.

Conclusions:

• The proposed pooling control strategy enhances product yield and process robustness in preparative chromatography.
• This approach offers a significant advancement for optimizing protein purification, particularly in sensitive applications.
• Effective pooling control is crucial for managing batch-to-batch variability in high-load chromatography.