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A two-electrode configuration for simplified amperometric detection in a microfabricated electrophoretic separation
M A Schwarz1, B Galliker, K Fluri
1University of Basel, Department of Chemistry, Spitalstrasse 51, 4056 Basel, Switzerland.
The Analyst
|March 10, 2001
Summary
This study presents a simplified amperometric detection method for electrophoretic separation devices. The technique successfully detects various analytes, including neurotransmitters and carbohydrates, with reduced analysis times.
Area of Science:
- Analytical Chemistry
- Electrochemistry
- Separation Science
Background:
- Conventional capillary electrophoresis often requires complex detection systems.
- Amperometric detection is a sensitive technique for analyzing electroactive species.
Purpose of the Study:
- To develop a simplified amperometric detection scheme for channel-based electrophoretic separation.
- To demonstrate the feasibility of this simplified approach for various analytes.
Main Methods:
- Utilized a simplified amperometric detection setup with amperometric working and electrophoretic ground electrodes.
- Employed gold, platinum, and copper working electrodes for different analyte classes.
- Performed electrophoretic separation on a channel-based device.
Main Results:
- Successfully determined neurotransmitters, ascorbic acid, and phenols using gold or platinum electrodes.
- Detected carbohydrates and amino acids with copper electrodes.
- Achieved results comparable to conventional capillary systems but with significantly reduced analysis times.
Conclusions:
- The simplified amperometric detection scheme is effective for channel-based electrophoretic separations.
- This method offers a faster and potentially more accessible alternative to traditional techniques.
- The approach is versatile, applicable to a range of analytes with appropriate electrode materials.
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