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Development of an electrophoretic method based on nanostructured materials for HbA1c determination
Mariana Hamer1,2, Narella Bassi1, Denise Agata Grela1
1Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Dpto. Química Analítica y Fisicoquímica, Cátedra de Química Analítica, Junin, Buenos Aires, Argentina.
Electrophoresis
|February 1, 2018
Summary
A new capillary electrophoresis (CE) method uses silica nanoparticles to detect glycosylated hemoglobin (HbA1c), a key diabetes marker. This stable, interference-free technique offers accurate HbA1c measurement comparable to commercial tests.
Area of Science:
- Analytical Chemistry
- Biochemistry
Background:
- Glycosylated hemoglobin (HbA1c) is crucial for diagnosing diabetes mellitus.
- Routine HbA1c detection is essential in clinical settings.
Purpose of the Study:
- To develop a novel capillary electrophoresis (CE) method for accurate HbA1c quantification.
- To utilize silica nanoparticles as a pseudo-stationary phase in CE for enhanced separation.
Main Methods:
- A new CE method was developed using silica nanoparticles (SiO 2 NPs) modified with a boronic acid derivative as a pseudo-stationary phase.
- Optimization of buffer pH and separation voltage identified optimal conditions (25 mM phosphate buffer, pH 6.5).
- Detection was performed using a UV/VIS absorbance detector at 415 nm.
Main Results:
- The developed CE method demonstrated excellent separation, resolution, and reduced separation time.
- A linear calibration curve was established (Area = 182.05%-1 × HbA1c - 377.02; R2 = 0.9826).
- The method showed no interference from carbamylated or acetylated hemoglobin and exhibited good stability.
Conclusions:
- The novel CE method provides a stable and reliable approach for HbA1c detection.
- Comparison with a commercial test showed no significant variations, validating the method's accuracy.
- This technique offers a promising alternative for routine HbA1c analysis in clinical diagnostics.
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