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Determination of L- and D-fucose using amperometric electrodes based on diamond paste
Raluca-Ioana Stefan-van Staden1, R'afat Mahmoud Nejem, Jacobus Frederick van Staden
1Laboratory of Electrochemistry and PATLAB Bucharest, National Institute of Research for Electrochemistry and Condensed Matter, 202 Splaiul Independentei Str., 060021, Bucharest, Romania. iustinavanstaden@yahoo.com
The Analyst
|December 14, 2011
Summary
Monocrystalline diamond electrodes offer sensitive detection of L- and D-fucose. These electrochemical sensors demonstrate high performance for analyzing fucose in biological samples like serum and urine.
Area of Science:
- Electrochemistry
- Analytical Chemistry
- Materials Science
Background:
- Monocrystalline diamond is a promising material for electrochemical applications due to its unique properties.
- Developing selective and sensitive electrochemical sensors is crucial for analyzing biologically relevant molecules like fucose.
- Different types of monocrystalline diamond (natural, synthetic-1, synthetic-2) may exhibit varying electrochemical performance.
Purpose of the Study:
- To design and characterize monocrystalline diamond-based electrochemical electrodes for the analysis of L- and D-fucose.
- To evaluate the response characteristics of these electrodes using voltammetric techniques.
- To determine the linear concentration ranges and detection limits for L- and D-fucose using different diamond types.
Main Methods:
- Electrochemical electrode fabrication using natural, synthetic-1, and synthetic-2 monocrystalline diamond.
- Cyclic voltammetry and differential pulse voltammetry (DPV) for response characterization.
- Optimization of electrolyte composition and pH for fucose detection.
Main Results:
- Electrochemical sensors based on natural, synthetic-1, and synthetic-2 diamond effectively detected L- and D-fucose.
- Optimized DPV methods yielded specific detection potentials and electrolyte conditions for each fucose enantiomer.
- Achieved highly sensitive detection with linear concentration ranges down to 10(-14) mol L(-1) for L-fucose and 10(-10) mol L(-1) for D-fucose, depending on the diamond type.
- Successful application of the sensors for L-fucose assay in human serum and urine samples.
Conclusions:
- Monocrystalline diamond electrodes are suitable for sensitive and selective electrochemical analysis of L- and D-fucose.
- The type of monocrystalline diamond influences the sensor's sensitivity and linear range.
- These developed sensors show potential for practical applications in biological fluid analysis.
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