Adaptive 2D Chromatography Control for Dynamic Gradient Optimization
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Solution Overview
Problem
Two-dimensional liquid chromatography is cumbersome for users due to the need for individual programming of multiple gradient runs in the second dimension, leading to inefficient use of measurement time and resource wastage in empty regions of the two-dimensional plot.
Innovation Solution
A control device and process for a sample separation apparatus that adjusts parameters of secondary separation sequences based on the progress of the primary separation sequence, allowing for a common sample separation method with parameterized shape relations and development instructions to optimize the distribution of sub-fractions across the two-dimensional plot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple gradient runs are programmed individually in the second dimension, then separation completeness is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The control device implements a universal gradient generation mechanism that creates multiple gradient runs automatically based on a single primary separation sequence. Instead of requiring individual programming of each second-dimension gradient, the system uses a single method definition with parameterized shape relations that can generate any number of secondary separation sequences dynamically, reducing programming complexity while maintaining separation completeness
Solution Approach 2:
The system performs self-configuration by automatically generating the multiple gradient runs needed for comprehensive separation. The control device monitors the primary separation sequence progress and autonomously adjusts the parameters of secondary separation sequences, eliminating the need for manual programming of each gradient run while ensuring complete sample separation
2Reliability
If multiple gradient runs are programmed individually in the second dimension, then separation completeness is improved, but ease of operation deteriorates
Solution Approach 1:
The control device autonomously manages the complex coordination between primary and secondary separation sequences. Users only need to define the common sample separation method with parameterized shape relations, and the system automatically generates, monitors, and adjusts all gradient runs based on the primary separation sequence progress, significantly reducing the user programming burden
Solution Approach 2:
The control device continuously monitors the progress of the primary separation sequence and uses this feedback to dynamically adjust the parameters of secondary separation sequences. This closed-loop control ensures that the second-dimension gradients are optimally synchronized with the first dimension, maintaining separation completeness while simplifying user operation
3Device complexity
If fixed gradient runs are used in the second dimension, then method simplicity is maintained, but productivity deteriorates due to empty regions in two-dimensional plot
Solution Approach 1:
The system transitions from static, fixed gradient runs to dynamic, adaptive gradient sequences. The parameters of secondary separation sequences are continuously adjusted based on the real-time progress of the primary separation sequence, allowing the measurement time to be dynamically allocated to regions where samples are actually present, thereby eliminating empty regions and improving productivity
Solution Approach 2:
The control device changes the parameters of secondary separation sequences dynamically during the measurement process. By adjusting gradient slope, duration, and timing based on the primary separation sequence progress and detected sample distribution, the system optimizes measurement time utilization and eliminates wasted time in empty regions while maintaining method simplicity through parameterized shape relations
4Ease of operation
If secondary separation sequences are executed independently, then operational flexibility is maintained, but homogeneity of sub-fraction distribution deteriorates
Solution Approach 1:
The control device merges the control of primary and secondary separation sequences into a unified common sample separation method. By combining the parameterized shape relations of both dimensions and coordinating them through feedback from the primary sequence progress, the system achieves homogeneous distribution of sub-fractions across the two-dimensional plot while preserving operational flexibility through parameterized adjustments
Data Source
AI summary
A control device for a sample separation apparatus, the sample separation apparatus including a first separation unit and a second separation unit downstream of the first separation unit and supplied with the fluidic sample after treatment by the first separation unit. A control device is configured for controlling the first separation unit to execute a primary separation sequence within a time interval for separating the fluidic sample into fractions, and for controlling the second separation unit to execute secondary separation sequences within the time interval for further separating the separated fractions into sub-fractions, wherein the secondary separation sequences form part of a common sample separation method defined by a common specification of the sample separation involving a set of parameters, and adjusting, over a progress of the primary separation sequence, at least one parameter according to which at least one of the plurality of secondary separation sequences is executed.