Highly sensitive detection of monosaccharides on microchip electrophoresis using pH discontinuous solution system

Area of Science:

• Analytical Chemistry
• Biochemistry
• Separation Science

Background:

• Monosaccharide analysis is crucial in various biological and chemical fields.
• Conventional capillary electrophoresis methods face limitations in detection sensitivity.
• Improving sensitivity is key for accurate monosaccharide quantification.

Purpose of the Study:

• To enhance the detection sensitivity of neutral and amino monosaccharides.
• To develop a simple and effective method compatible with microchip electrophoresis.
• To maintain or improve separation resolution during enhanced detection.

Main Methods:

• Utilized a pH discontinuous solution system with specific borate and Tris-borate buffers.
• Employed 2-aminoacridone as a labeling agent for monosaccharides.
• Integrated the system with conventional microchip electrophoresis.
• Investigated monosaccharide stacking for sensitivity enhancement.

Main Results:

• Achieved a 19.6-48.7 fold increase in sensitivity for neutral monosaccharides.
• Achieved a 44.4-65.9 fold increase in sensitivity for amino monosaccharides.
• Demonstrated no deterioration in separation resolution.
• Confirmed compatibility with standard microchip electrophoresis platforms.

Conclusions:

• The pH discontinuous solution system significantly enhances monosaccharide detection sensitivity.
• This technique offers a simple and effective approach for sensitive monosaccharide analysis.
• The method is readily applicable to existing microchip electrophoresis tools for improved analytical performance.