Ion Chromatograph Suppressor with Opposing Flow Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current ion chromatographs face challenges in reducing chromatogram background and improving sample analysis accuracy due to limitations in ion suppressor dialysis efficiency.
Innovation Solution
The ion chromatograph design includes a separation column, an ion suppressor with opposing eluent and electrode liquid flow paths, and a detector, where the eluent flow path has opposite flow directions for its portions, and the electrode liquids are supplied to match the eluent flow direction, enhancing electrodialysis efficiency and reducing chromatogram background.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ion suppressor design with single flow path is used, then device complexity is low, but chromatogram background cannot be reduced sufficiently
Solution Approach 1:
The ion suppressor is divided into multiple flow-path portions (first, second, third, and fourth portions) with opposite flow directions. This segmentation allows different regions of the suppressor to perform electrodialysis with optimized flow patterns, improving background reduction capability while maintaining manageable device complexity through modular design.
Solution Approach 2:
The invention introduces a multi-dimensional flow path configuration where eluent and electrode liquid flow in opposite directions through different portions of the suppressor. This spatial arrangement creates multiple interaction zones for electrodialysis, enhancing the suppression effect and reducing chromatogram background beyond what single-direction flow can achieve.
2Measurement precision
If electrodialysis efficiency is improved by optimizing flow paths, then chromatogram background is reduced, but uniformity of electrodialysis efficiency across flow path becomes challenging
Solution Approach 1:
Different flow-path portions are designed with opposite flow directions to create locally optimized electrodialysis conditions. The first and second portions have one flow direction pattern while the third and fourth portions have the opposite pattern, ensuring that each local region contributes uniformly to overall electrodialysis efficiency and background reduction.
Solution Approach 2:
The flow path configuration creates a periodic alternation of flow directions through the suppressor. By alternating the flow direction patterns in successive portions, the system maintains uniform electrodialysis efficiency across the entire suppressor length, preventing localized inefficiencies that would occur with single-direction flow.
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 configuration improves the accuracy of sample analysis by uniformly enhancing electrodialysis efficiency across the eluent flow path, reducing chromatogram background and maintaining high analysis precision.
Implementation Method 1
Ion exchange is performed by electrodialysis between an eluent in the eluent flow path, and the first regeneration liquid flow path and the second regeneration liquid flow path, whereby electrical conductivity of the eluent is lowered
Implementation Method 2
A sample is separated into ion species components by passing through the separation column
Data Source
AI summary
First and second flow-path portions are opposite to each other, and communicate with each other such that a direction in which an eluent flows through the first flow-path portion and a direction in which an eluent flows through the second flow-path portion are opposite to each other. First and second electrode liquid flow paths are respectively opposite to the first and second flow-path portions. First and second electrode liquids are respectively supplied to the first and second electrode liquid flow paths, such that a direction in which the first electrode liquid flows through the first electrode liquid flow path is same as a direction in which an eluent flows through the first flow-path portion and a direction in which the second electrode liquid flows through the second electrode liquid flow path is same as a direction in which an eluent flows through the second flow-path portion.