Ion Exchange Membrane Impedance Detection for Multi-Species Analysis
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Solution Overview
Problem
Existing techniques for detecting species in complex samples are not robust and lack reliability in identifying multiple species.
Innovation Solution
A system utilizing an ion exchange membrane with impedance electrodes, a voltage/current source, and a computer to determine species based on electrophoretic migration and impedance response, allowing for integrated chromatography and improved species detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional detection techniques are used for species identification, then the system is simpler to operate, but the reliability of species identification in complex samples deteriorates
Solution Approach 1:
The detection system is segmented into functionally distinct modules: an ion exchange membrane for separation, impedance electrodes for detection, and a computer for data analysis. This segmentation allows each component to specialize in a specific task, improving overall reliability while managing complexity through modular design
Solution Approach 2:
The patent combines electrophoretic separation and impedance detection into a single integrated system. The ion exchange membrane and impedance electrodes work together in one device, allowing simultaneous separation and detection of multiple species, which improves reliability without requiring multiple separate instruments
2Measurement precision
If indirect detection methods (pH or conductivity) are used, then the device complexity is reduced, but the measurement precision for species identification deteriorates
Solution Approach 1:
The patent replaces indirect chemical measurement methods with direct electrical impedance detection. Instead of measuring pH or conductivity changes, the system uses impedance electrodes to directly detect species based on their electrical properties, providing more precise identification while maintaining reasonable device complexity
Solution Approach 2:
The system detects species by measuring changes in electrical impedance (an electrical property analogous to optical properties), which varies depending on the presence and concentration of different ionic species. This provides species-specific detection signals similar to how color changes indicate specific substances in other analytical methods
3Ease of operation
If capillary electrophoresis is used for species separation, then the sample handling is improved, but the device complexity and required infrastructure increase
Solution Approach 1:
The patent extracts the essential separation function from complex capillary electrophoresis systems and implements it using a simple ion exchange membrane. This membrane-based approach provides effective species separation without requiring capillary tubes, high-voltage power supplies, or complex detection systems, thereby improving ease of operation while reducing infrastructure requirements
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 reliable identification of species in complex samples by combining electrophoretic migration and impedance measurement, providing an integrated chromatography technique for ion analysis.
Implementation Method 1
determine the presence of said at least one species in said sample based on a combination of their electrophoretic migration rate through the ion exchange membrane
Implementation Method 2
obtain impedance data from the impedance analyser... determine the presence of said at least one species in said sample based on the obtained source data, the obtained impedance data
Data Source
AI summary
The present disclosure relates to a system (100) for detection and identification of at least one species in a sample in an ionic exchange membrane (110), comprising an ion exchange membrane (110), an impedance analyser (120), source (141) and target electrodes (142), a voltage and/or current source (140) arranged to provide an electric potential difference, a computer (170), and at least two impedance electrodes (121, 122) arranged at the ion exchange membrane (110) and connected to the impedance analyser (120). The source (141) and target electrodes (142) are connected to said source (140), and are arranged to upon addition of source (151) and target electrolyte (152) be in ionic contact with a first (111) and second region (112) of the ion exchange membrane (110) respectively. The computer (170) is arranged to obtain source data comprising voltage data and/or current data from said source (140); obtain impedance data from the impedance analyser (120); and determine the presence of said at least one species in said sample based on the obtained source data, the obtained impedance data, and predetermined reference data for the ion exchange membrane (110).