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Development of an integrated capillary electrophoresis/sensor for L-ascorbic acid detection.
Laura Castelletti1, Sergey A Piletsky, Anthony P F Turner
1Department of Science and Technology, University of Verona, Verona, Italy.
Electrophoresis
|February 13, 2002
Summary
A novel capillary electrophoresis biosensor was developed for ascorbic acid measurement. This polyaniline-based sensor offers sensitive and specific detection, paving the way for clinical studies.
Area of Science:
- Analytical Chemistry
- Biomedical Engineering
Background:
- Ascorbic acid (Vitamin C) plays crucial roles in biological systems.
- Accurate measurement of ascorbic acid is vital for clinical diagnostics and research.
- Existing methods may have limitations in sensitivity, specificity, or speed.
Purpose of the Study:
- To develop a sensitive and specific biosensor for ascorbic acid detection.
- To integrate capillary electrophoresis (CE) with a polyaniline optical sensor.
- To evaluate the performance of the developed CE/biosensor system.
Main Methods:
- Coupling of a polyaniline optical sensor with capillary electrophoresis.
- Modification of the capillary column with a polyaniline redox-sensitive film.
- Detection of ascorbic acid via changes in optical absorbance at 650 nm.
Main Results:
- The sensor demonstrated a linear response to ascorbic acid concentrations from 2.5-250 mg/L.
- High specificity and sensitivity were achieved.
- Rapid response times (approx. 2 minutes) and good reproducibility were observed.
Conclusions:
- The developed CE/polyaniline-sensor is a promising tool for ascorbic acid quantification.
- Its characteristics support potential applications in studying the link between L-ascorbic acid levels in body fluids and clinical parameters like cell ageing.