Multidimensional Chromatography Peak Purity Analysis
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Solution Overview
Problem
Current multidimensional chromatographic systems are limited to two-dimensional analysis and cannot re-inject analytes from the second dimension into higher dimensions, restricting their applicability in advanced analyses such as on-column sample degradation or chiral studies.
Innovation Solution
A multidimensional chromatographic assembly and method that utilizes multiposition valves and fluid channeling devices to trap and re-inject analytes from one chromatographic medium to another, enabling analysis in multiple dimensions by isolating peaks in fluid holding devices and diverting them to subsequent chromatographic streams as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multidimensional chromatographic systems are extended beyond two dimensions, then analytical capability for advanced applications is improved, but device complexity increases due to requiring multiple pumps and detectors
Solution Approach 1:
A single detector is designed to serve multiple dimensions by receiving eluent from different chromatographic columns through a valve system. The detector functions universally for both first dimension and second dimension analysis, eliminating the need for separate detectors for each dimension and reducing overall device complexity while maintaining multidimensional analytical capability
Solution Approach 2:
The system merges the detection function for multiple dimensions into a single detector unit. By combining the eluent streams from different dimensions through a valve system and directing them to one detector, the patent reduces the number of components needed while preserving the ability to perform complex multidimensional analyses
2Measurement precision
If analytes are trapped and re-injected from second dimension to higher dimensions, then peak purity validation capability is improved, but device complexity increases due to requiring additional fluid channeling devices
Solution Approach 1:
The system performs preliminary trapping of analytes in a holding loop during the first dimension analysis. By capturing analytes of interest in advance and storing them temporarily, the system enables subsequent re-injection into the second dimension for further analysis. This preliminary action allows for comprehensive peak purity validation while using a standardized valve and loop configuration that doesn't significantly increase device complexity
Solution Approach 2:
A holding loop serves as an intermediary component between the first dimension column and the second dimension column. The loop temporarily stores trapped analytes and facilitates their transfer to the next dimension through valve control. This intermediary approach enables complex multidimensional analysis sequences using simple, well-understood components rather than requiring complex direct coupling systems
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
Enables the performance of multi-dimensional analyses beyond two dimensions, allowing for the re-examination and validation of peak purity in higher dimensions, enhancing the capability for advanced analytical applications.
Implementation Method 1
A multidimensional chromatographic assembly and method that utilizes multiposition valves and fluid channeling devices to trap and re-inject analytes from one chromatographic medium to another, enabling analysis in multiple dimensions by isolating peaks in fluid holding devices and diverting them to subsequent chromatographic streams as needed
Data Source
AI summary
A multidimensional chromatographic assembly includes a pump module, an injector, a path selector device, an array of chromatographic media, a loop selector device and a detector assembly for receiving at least a portion of an analyte stream and flowing the injected stream into the detector assembly via a chromatographic medium (the first dimension). At least a portion of the analyte of interest is then channeled into a chromatographic medium of interest (the second dimension) and re-circulated through the detector assembly. The iteration (multidimension) is continued until all aspects of the chromatogram and the peaks are judged to be analyzed. The entire process is controlled from a computer and the results are collected to make decisions on the analytical and the process controls.