Chromatography Column Venting for Sterile Gas and Pressure Purging
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Solution Overview
Problem
Chromatography columns face challenges with trapped gas and pressure issues during gamma irradiation, which can disrupt fluid flow dynamics and increase the risk of contamination, necessitating a method to maintain sterility and separation performance.
Innovation Solution
A tubing and valve system is connected to pre-packed chromatography columns to create a closed system, allowing for sterilization and subsequent removal of gas bubbles and pressure through purging with sterile liquid, using a hydrophobic vent filter and check valve to ensure aseptic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gamma irradiation is applied to sterilize pre-packed chromatography columns, then sterility is achieved, but gas pockets and pressurization occur within the packed bed
Solution Approach 1:
The system segments the column into multiple zones with inlet and outlet ports at different elevations, allowing gas pockets to be isolated and removed from specific regions without compromising the entire packed bed structure or sterility
Solution Approach 2:
The invention extracts harmful gas pockets and excess pressure from the packed bed through dedicated outlet ports positioned at strategic elevations, separating the gas removal function from the main chromatography flow path while maintaining sterility
2Ease of operation
If gas pockets are removed from the packed bed, then fluid flow dynamics are improved, but sterility may be compromised
Solution Approach 1:
The system introduces an intermediary gas removal pathway through outlet ports and external tubing that allows gas extraction without direct intervention into the sterile packed bed, using the intermediary pathway to bridge gas removal and sterility maintenance
Solution Approach 2:
The invention replaces mechanical disruption of the packed bed with a controlled pressure differential system that uses pneumatic principles to draw out gas pockets through outlet ports, substituting direct mechanical intervention with a softer pressure-based approach
3Manufacturing precision
If pressure is reduced from the packed bed, then chromatography performance is maintained, but contamination risk increases
Solution Approach 1:
The system performs preliminary gas and pressure removal through outlet ports before initiating the chromatography run, eliminating harmful factors in advance while maintaining the sterile barrier, so that subsequent operation proceeds without contamination risk
Solution Approach 2:
The invention employs disposable sterile connectors and tubing in the gas removal pathway that can be discarded after single use, eliminating the need to maintain sterility of reusable components during the gas removal process while preserving the sterile packed bed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively maintains chromatography flow path integrity and sterility, ensuring performance comparable to pre-irradiation values by removing trapped gases and pressure without breaching sterility, thus preventing contamination and flow disruptions.
Implementation Method 1
using a hydrophobic vent filter and check valve to ensure aseptic conditions
Implementation Method 2
allowing for sterilization and subsequent removal of gas bubbles and pressure through purging with sterile liquid
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Methods and systems for removing gases and/or pressure formed during the sterilization, e.g., the gamma irradiation, of prepacked chromatography systems (column plus attached tube and valve set) are described. The methods include purging the gas and/or pressure through specially designed tube and valve sets without breaching the sterility of the prepacked sterile chromatography system. The systems include a sterile or aseptic pre-packed chromatography column including a column having an inlet and an outlet, a tubing and valve set attached to the inlet and the outlet, and a pump configured to pump sterile or aseptic liquid from the fluid source along the tubing and valve set, into the column tube inlet and out of the column tube outlet along a first flow path, thereby removing any entrapped gas and/or pressure from the chamber.