Chromatography Fraction Collection Timing Control
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Solution Overview
Problem
Current chromatography systems face inefficiencies in capturing target products during elution due to limited resolution of UV sensors, particularly in small volume columns, leading to inefficient capture and potential product loss.
Innovation Solution
A method for controlling fraction collection in chromatography systems that adjusts trigger points based on the timing of the elution phase, using high-frequency data from detectors to optimize the collection of target products, allowing for improved yield and quality without relying on high-resolution UV detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a UV sensor with limited resolution is used to detect target product during elution in small volume columns, then the system complexity is reduced, but the capture efficiency of target product deteriorates
Solution Approach 1:
The patent applies preliminary action by calculating and storing trigger points and collection time windows before the elution process begins. The control system pre-determines the optimal timing for fraction collection based on historical data and process parameters, allowing the system to automatically capture the target product peak without requiring real-time high-resolution detection during the actual elution event.
Solution Approach 2:
The system uses feedback by continuously monitoring the UV absorbance signal during elution and comparing it against pre-calculated trigger points. When the signal reaches the predetermined trigger point, the system automatically activates the fraction collector within the calculated time window, creating a closed-loop control system that optimizes capture efficiency even with limited sensor resolution.
2Productivity
If the elution cycle is shortened to increase productivity in small volume columns, then the processing speed increases, but the detection resolution deteriorates
Solution Approach 1:
The patent resolves this contradiction by pre-calculating trigger points and collection time windows before each elution cycle. This allows the system to maintain high productivity with short elution cycles while achieving precise detection through predetermined thresholds rather than requiring high-speed real-time analysis during the compressed time window.
Solution Approach 2:
The system dynamically adjusts the collection time window based on the specific elution characteristics and flow rates. The control algorithm optimizes the timing parameters for each elution event, allowing the system to adapt to varying conditions and maintain detection precision even as cycle times are reduced to increase throughput.
3Manufacturing precision
If real-time detection with high update frequency is implemented to improve capture timing, then the capture precision improves, but the device complexity and cost increase
Solution Approach 1:
The patent implements a feedback-based control system that uses pre-calculated trigger points to determine when to activate fraction collection. The system monitors the UV signal and automatically triggers collection when the predetermined threshold is reached, achieving precise capture timing through intelligent control logic rather than requiring inherently faster hardware.
Solution Approach 2:
The control system acts as an intermediary between the UV detector and the fraction collector. It processes the detector signal, applies the pre-calculated trigger logic, and determines the optimal activation timing for the fraction collector. This intermediary layer enables precise capture timing while allowing the use of standard, lower-cost detector and actuator components.
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
This approach enhances the yield and quality of captured target products by precisely timing the collection of eluted fractions, reducing impurities and product loss, even in systems with high flow rates and short residence times.
Implementation Method 1
a detector configured to detect the presence of target product in an outlet flow from the at least one chromatography column
Implementation Method 2
liquid chromatography is one of the most commonly used separation principles in the analysis and manufacture of biomolecules
Data Source
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AI summary
The present invention relates to a method for controlling fraction collection of a target product 27 in a chromatography system 49 configured for cyclic purification performed on a sample comprising the target product 27. The method comprises determining trigger points for target product 27 collection in relation to presence of target product in the outlet; setting a first time period based on the trigger points within which the elution in the first cycle is captured; evaluating timing of the captured elution to identify the next time period; applying the timing to capture elution during the elution phase in the following cycle; and collecting the captured elution in the following cycle. The last three steps are repeated to capture the elution during the elution phase of the following cycles until no more target product 27 is desired.