Compact Liquid Chromatography Layout for Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid chromatography systems are bulky due to the inclusion of a column oven, leading to increased size, volume, and distance between components, which results in peak broadening, pressure drop, and decreased throughput.
Innovation Solution
Elimination of the column oven and direct connection of the preheater to the injector valve and liquid chromatography column, along with the use of a preheater to heat the exterior of the column, reduces the system size by minimizing extra-column volume and peak broadening, achieved through direct connections and proximity heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a column oven is used to provide thermal management, then thermal gradients are reduced and temperature stability is improved, but system size and volume increase significantly
Solution Approach 1:
The preheater is merged with the injector valve assembly, combining two separate functions (heating and injection) into a single integrated component. This eliminates the need for a separate column oven while maintaining thermal management, thereby reducing system volume while preserving temperature stability
Solution Approach 2:
The preheater serves multiple functions: it heats the mobile phase before injection and is integrated with the injector valve assembly. This multi-functionality allows the system to maintain thermal management capabilities without requiring a dedicated column oven, thus reducing overall system volume
2Adaptability or versatility
If connection tubing length is increased to connect components, then system flexibility is improved, but peak broadening and pressure drop increase
Solution Approach 1:
The preheater is directly integrated with the injector valve assembly, eliminating the need for connection tubing between these components. This direct integration reduces extra-column volume and dead volume, thereby minimizing peak broadening while maintaining system functionality
Solution Approach 2:
The unnecessary connection tubing between the preheater and injector valve is removed through direct integration. This extraction of redundant components reduces dead volume and minimizes its harmful effects on peak width and pressure drop
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
The solution results in a compact liquid chromatography system that reduces peak broadening and analyte loss, enabling higher throughput and resolution with improved thermal management.
Implementation Method 1
The preheater 106 heats the mobile phase to a desired set point prior to the mobile phase entering the liquid chromatography column
Implementation Method 2
direct connection of the preheater to the injector valve and liquid chromatography column, along with the use of a preheater to heat the exterior of the column
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
The exemplary embodiments may provide liquid chromatography systems that are smaller in size and with reduced extra-column volume than conventional liquid chromatography systems. The exemplary embodiments may reduce the size of the liquid chromatography systems enough that the liquid chromatography systems of the exemplary embodiments may be deployed adjacent to automated sample preparation robotics, adjacent to a process stream, or adjacent to the inlet of a mass spectrometer. In addition, the exemplary embodiments may reduce the extra-column volume of the liquid chromatography system by eliminating many of the connection tubes found in conventional liquid chromatography systems and by situating components of the liquid chromatography system in closer proximity.