Chromatography Pump Pressure Equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In chromatography systems, particularly in tandem LC workflows, switching between separation columns often leads to pressure mismatches, causing sudden pressure changes that can compromise analytical results and reduce column lifetime.
Innovation Solution
A method for operating a chromatography system that involves determining and setting target pressures for each pump to ensure pressure alignment between separation columns before switching configurations, thereby minimizing pressure changes during column switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If switching between separation columns is performed to increase analysis throughput, then productivity is improved, but pressure stability deteriorates due to pressure mismatches between columns
Solution Approach 1:
The system performs preliminary pressure equalization by adjusting the flow rate of the second pump to match the pressure of the first pump before switching between columns. This preliminary action ensures that when the column switch occurs, there is no pressure mismatch, thus maintaining pressure stability while enabling high-throughput parallel analysis workflows
Solution Approach 2:
The system continuously monitors pressure at both pumps and uses this feedback to dynamically adjust the flow rate of the second pump. The pressure feedback mechanism ensures that pressure equalization is maintained in real-time, allowing the system to adapt to changing conditions and maintain stability during column switching operations
2Duration of action of stationary object
If pressure equalization is implemented to prevent pressure jumps, then column lifetime is improved, but system complexity increases due to additional pressure control steps
Solution Approach 1:
The second pump serves multiple functions: it conditions the second column during parallel analysis and simultaneously acts as a pressure adjustment device to equalize pressures before switching. This multi-functionality eliminates the need for separate pressure equalization hardware, reducing system complexity while extending column lifetime through pressure jump prevention
Solution Approach 2:
The system uses its own existing pumps to perform pressure equalization without requiring external pressure control devices. The second pump self-adjusts its flow rate to match the first pump's pressure, making the system self-sufficient and avoiding additional complexity from external pressure control equipment
3Loss of time
If parallel analysis with multiple columns is used to reduce analysis time, then loss of time is reduced, but reliability deteriorates due to pressure mismatches compromising analytical results
Solution Approach 1:
The system performs preliminary pressure matching by adjusting the second pump's flow rate before column switching occurs. This ensures that when samples are transferred between columns in parallel workflows, pressure conditions are equalized, preventing artifacts in analytical results and maintaining high reliability while enabling time-efficient parallel analysis
Solution Approach 2:
Real-time pressure monitoring and feedback control ensure that pressure conditions remain matched during parallel analysis operations. The system continuously adjusts the second pump based on pressure feedback, guaranteeing that analytical results from multiple columns run in parallel are reliable and free from pressure-induced artifacts
Data Source
AI summary
A method for operating a chromatography system comprises the system assuming a first configuration, wherein a first pump is fluidly connected to a first separation column, and a second pump is fluidly connected to a second separation column. Further the method comprises while in the first configuration the first pump providing a fluid to the first separation column, the second pump providing a fluid to the second separation column, determining a second pump target pressure, determining a first pump target pressure based on the second pump target pressure, and setting the first pump to provide fluid at the first pump target pressure. Furthermore, the method comprises the system switching to a second configuration, wherein the first pump is fluidly connected to the second separation column, while the first pump provides fluid at the first pump target pressure. Additionally disclosed are a respective chromatography system and computer program product.