Improved detection and derivatization in capillary electrophoresis

Area of Science:

• Analytical Chemistry
• Biochemistry
• Separation Science

Background:

• Capillary electrophoresis (CE) offers excellent separation efficiency and low mass detection.
• However, CE is limited by poor concentration detection limits, hindering the analysis of low-abundance analytes.
• Improving sensitivity is crucial for comprehensive biofluid analysis.

Purpose of the Study:

• To review advancements in capillary electrophoresis for enhanced concentration detectability.
• To focus on derivatization strategies as a primary method for sensitivity improvement.
• To discuss complementary techniques like sample pre-concentration and detector design modifications.

Main Methods:

• Detailed examination of pre- and post-capillary derivatization techniques.
• Discussion of various sample concentration methods applicable to CE.
• Overview of novel detector designs aimed at boosting signal intensity.
• Analysis of derivatization strategies for specific biofluid analytes.

Main Results:

• Derivatization significantly enhances the detectability of analytes in CE.
• Specific methods show marked improvements for amino acids, peptides, proteins, oligonucleotides, and oligosaccharides.
• Sample concentration and detector improvements further contribute to overall sensitivity gains.
• Optimized derivatization protocols are key to overcoming CE's inherent detection limitations.

Conclusions:

• Strategic application of derivatization methods is essential for improving CE concentration detection limits.
• Combined approaches involving sample concentration and advanced detectors offer synergistic benefits.
• These advancements expand the utility of CE for sensitive biofluid biomarker discovery and quantification.