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Integrated on-capillary electrochemical detector for capillary electrophoresis
1Departments of Chemistry and Pharmaceutical Chemistry and Center for Bioanalytical Research, University of Kansas, 2095 Constant Avenue, Lawrence, Kansas 66047.
Analytical Chemistry
|May 31, 2011
Summary
A novel on-capillary electrochemical detector simplifies capillary electrophoresis. This gold wire detector enables fast separations and eliminates complex alignment, improving catecholamine and carbohydrate analysis.
Area of Science:
- Analytical Chemistry
- Electrochemistry
- Separation Science
Background:
- Conventional in-capillary electrochemical detection requires complex alignment systems.
- Existing methods can be time-consuming and require specialized equipment.
Purpose of the Study:
- To describe a new on-capillary electrochemical detector for capillary electrophoresis.
- To demonstrate its utility for analyzing catecholamines and carbohydrates.
Main Methods:
- A gold wire was permanently mounted at the capillary end, perpendicular to flow.
- The detector was used for off-column detection of catecholamines and end-column detection of carbohydrates via capillary electrophoresis-pulsed amperometric detection (CE-PAD).
Main Results:
- The detector eliminates the need for micromanipulators or specialized cell holders.
- It enables relatively fast capillary electrophoresis electrochemical (CEEC) separations, even with short capillaries.
- Successful detection of catecholamines and carbohydrates was achieved.
Conclusions:
- The described on-capillary electrochemical detector offers a simplified and efficient approach for CE analysis.
- This method enhances speed and ease of use for detecting various analytes, including catecholamines and carbohydrates.
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