Ion Exchange Chromatography Device Integrity Testing via Net Breakthrough
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Solution Overview
Problem
Existing methods for testing the integrity and adsorbent capacity of ion exchange chromatography devices are either destructive or unable to detect deficiencies in the ion exchange media, which can lead to reduced separation performance and viral clearance capabilities.
Innovation Solution
A non-destructive method involving the use of a challenge solution with a second ion and a non-binding species to monitor breakthrough values, allowing for the calculation of a net breakthrough value that can assess the integrity, adsorbent capacity, and viral clearance performance of the chromatography device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-destructive testing method is used to evaluate chromatography device integrity, then the device's subsequent performance is preserved, but the ability to detect deficiencies in ion exchange media is reduced
Solution Approach 1:
A challenge solution containing a second ion with higher binding affinity serves as an intermediary to indirectly assess the ion exchange media's condition. The second ion competes with the first ion for binding sites, and its breakthrough behavior provides information about media integrity without destroying the media itself
Solution Approach 2:
The method changes the chemical parameters of the testing approach by using ions with different binding affinities. By monitoring the breakthrough of both the second ion and non-binding species, and calculating the net breakthrough value, the method achieves sensitive detection of media deficiencies while maintaining device integrity
2Reliability
If existing testing methods are used to assess adsorbent capacity, then viral clearance prediction is reduced, but the testing process is simpler
Solution Approach 1:
The challenge solution testing method serves multiple functions simultaneously: it assesses device integrity, evaluates adsorbent capacity, and predicts viral clearance performance. This multi-functionality is achieved by monitoring two parameters (second ion and non-binding species breakthrough) and calculating the net breakthrough value, which correlates with viral clearance capability
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 evaluates the integrity and adsorbent capacity of chromatography devices, predicting their viral clearance performance in a subsequent flow-through operation without affecting the device's subsequent performance.
Implementation Method 1
contacting the ion exchange media with a challenge solution, wherein the challenge solution comprises (i) a second ion, which binds to the ion exchange media and (ii) a non-binding species, which does not bind to the ion exchange media, wherein the second ion has a higher binding affinity to the ion exchange media than the first ion
Implementation Method 2
monitoring an outlet fluid from the outlet of the chromatography device with at least one detector wherein both the second ion and the non-binding species are monitored
Data Source
AI summary
Described herein is method for testing an ion exchange chromatography device. The method includes monitoring both a binding and a non-binding species and determining their breakthrough point to determine a net breakthrough value. The method can be used to determine the integrity of the chromatography device, ensure that the chromatography device possesses the expected adsorbent capacity, and/or determine viral clearance of the chromatography device.