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Integrated potentiometric detector for use in chip-based flow cells
1Zeneca/Smithkline Beecham Centre for Analytical Science, Department of Chemistry, Imperial College of Science, Technology and Medicine, London, UK.
Analytical Chemistry
|July 25, 2000
Summary
A novel potentiometric chip sensor for ion-selective electrodes (ISE) offers improved ruggedness for industrial use. Its design ensures stable performance comparable to traditional electrodes, enhancing ion analysis capabilities.
Area of Science:
- Electrochemistry
- Sensor Technology
- Materials Science
Background:
- Conventional ion-selective electrodes (ISEs) face challenges with ruggedness, limiting their application in demanding industrial settings.
- Solvent polymeric membranes are crucial components in ISEs for selective ion detection.
Purpose of the Study:
- To introduce a new potentiometric chip sensor design for ISEs.
- To address the technical limitations of ruggedness in existing ISEs for industrial process applications.
Main Methods:
- Development of a chip sensor incorporating a solvent polymeric membrane designed to contain the organic cocktail.
- Implementation of a flow-through design allowing sample solution to pass over the membrane.
- Performance evaluation of a Barium ion-selective electrode (Ba2+-ISE) membrane utilizing a Vogtle ionophore.
Main Results:
- The chip sensor successfully traps the organic cocktail and allows sample flow.
- The sensor demonstrates enhanced ruggedness suitable for industrial processes.
- Electrochemical behavior of the Ba2+-ISE membrane within the chip sensor mirrors that of conventional electrodes and microelectrodes.
Conclusions:
- The novel chip sensor design overcomes ruggedness issues, making it suitable for industrial processes.
- The sensor exhibits comparable electrochemical performance to traditional ISEs.
- This technology advances the development of robust and reliable ion-sensing devices.