Liquid Chromatography Flow Switching for Detector Timing Alignment
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Solution Overview
Problem
Existing liquid chromatography systems face inefficiencies in detector utilization, leading to suboptimal throughput, inconsistent chromatographic results, and excessive data storage requirements due to misalignment between gradient delivery and detection timing.
Innovation Solution
A method for optimizing a liquid chromatography system by cyclically switching the flow paths of multiple separation columns and pumps, synchronized with detector activation and deactivation, to align gradient delivery and detection timing, using pre- and post-column switching valves controlled by a controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separation columns are used in tandem to increase throughput, then productivity increases, but detector utilization becomes suboptimal and data storage requirements increase
Solution Approach 1:
The patent implements periodic switching between different column configurations using switching valves. The system alternates between analyzing samples from different columns and performing maintenance tasks like column equilibration, creating a rhythmic operational pattern that optimizes detector usage while maintaining high throughput.
Solution Approach 2:
The system dynamically reconfigures the chromatographic setup during operation by switching between different column-pump-detector arrangements. This dynamic reconfiguration allows the system to adapt to different operational phases, maximizing detector utilization while processing multiple samples sequentially.
2Productivity
If sequential analysis of multiple columns is performed to increase throughput, then productivity increases, but chromatographic result consistency deteriorates
Solution Approach 1:
The system performs preliminary equilibration of columns and preparation of mobile phases before sample analysis begins. This pre-conditioning ensures that all columns start in identical, optimized states, guaranteeing consistent chromatographic results across multiple sequential analyses.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor chromatographic performance parameters during operation. Based on this feedback, the control system adjusts operational parameters to maintain consistency across different column analyses, ensuring reliable and reproducible results.
3Measurement precision
If detector is continuously active to capture all chromatographic data, then measurement precision is maintained, but data storage requirements increase
Solution Approach 1:
The system extracts and records only the essential chromatographic data during active detection periods, rather than continuously storing all possible data. By synchronizing detector activation with actual analysis windows, the system captures necessary information while minimizing data storage requirements.
Solution Approach 2:
The detector operates periodically only during active analysis windows rather than continuously. The system synchronizes detector activation with sample elution periods, turning the detector on only when data collection is necessary and keeping it off during column equilibration or maintenance phases, thus reducing storage needs while maintaining precision.
Data Source
AI summary
The present invention relates to a method performed in a liquid chromatography system, the method comprising: in a first configuration (I), wherein a first separation column is fluidly connected to a separation pump and a detector, supplying a flow from the first separation column towards the detector by means of the separation pump in the first configuration (I); and switching the liquid chromatography system from the first configuration (I) to a second configuration (II), wherein the first separation column is fluidly connected to a second pump and to the detector, and supplying a flow from the first separation column towards the detector by means of the second pump in the second configuration (II). The present invention also relates to a corresponding system, use, computer program product, computer-readable medium and data carrier signal.