Integrated Guard Column Device for Chromatography Band Spreading
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Solution Overview
Problem
High-pressure chromatography systems are sensitive to particulates and pressure pulsations, which can lead to reduced column efficiency and increased maintenance needs, particularly due to the use of guard columns that introduce additional conduits and tubing, causing band spreading and decreased responsiveness.
Innovation Solution
A device featuring a body with a frit element and separation media, designed to protect columns from particulates and pressure pulsations, utilizing a compact design with a frit section and media chamber to minimize band spreading and maintain system responsiveness, including a compression fitting and ferrule assembly for secure attachment and fluid communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard columns are used to protect analytical columns from particulates and pressure pulsations, then column protection and system reliability are improved, but device complexity increases due to additional conduits and tubing
Solution Approach 1:
The guard column and analytical column are merged into a single integrated device body, eliminating the need for separate guard columns and reducing the number of conduits and tubing required for connection
Solution Approach 2:
The device body serves multiple functions: it houses both the guard column and analytical column, provides frit elements for particle filtration, and integrates fluid communication pathways, thereby reducing overall system complexity
2Reliability
If additional conduits and tubing are added for guard columns, then column protection is improved, but band spreading increases and system responsiveness decreases
Solution Approach 1:
By combining the guard column and analytical column into one integrated device, the patent eliminates additional conduits and tubing that would otherwise cause band spreading and reduce system responsiveness
Solution Approach 2:
The harmful elements (additional conduits and tubing) are extracted from the system by integrating the columns directly, thereby removing the source of band spreading while maintaining column protection functionality
3Productivity
If columns operate at high pressures above 30 MPa, then productivity and separation efficiency are improved, but sensitivity to particulates and pressure pulsations increases
Solution Approach 1:
The frit element performs preliminary filtration of particulates before they can enter and damage the analytical column, enabling the system to operate at high pressures without increased sensitivity to particulate contamination
Solution Approach 2:
The guard column acts as a protective buffer that absorbs the impact of particulates and pressure pulsations before they can affect the analytical column, allowing high-pressure operation while protecting against harmful factors
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 device effectively separates compounds from particulates while maintaining system responsiveness and reducing the impact of pressure pulsations, enhancing the longevity and performance of high-pressure chromatography systems by minimizing band spreading and maintaining column efficiency.
Implementation Method 1
The frit element is held in the frit section for retaining the separation media
Implementation Method 2
The present invention relates to devices, methods and apparatus for performing separations, and, in particular, separations performed by chromatography for analytical purposes
Implementation Method 3
The dissolved compounds exhibit differences in absorbance or affinity to a media that is not dissolved in the solvent
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Embodiment of the present invention feature a device having a body, a separation media and a frit element. The exterior surface of the body has a first attachment means positioned radially about at least one of the media chamber and the frit section to form a compact assembly.