Capillary electrophoresis-based immunoassays: principles and quantitative applications.

Area of Science:

• Analytical Chemistry
• Biochemistry
• Immunotechnology

Background:

• Capillary electrophoresis (CE) offers efficiency, speed, and minimal sample requirements.
• Antibodies provide high selectivity as binding agents in immunoassays.
• Combining CE with immunoassays enhances analytical capabilities.

Purpose of the Study:

• To review various assay formats and detection modes for CE immunoassays.
• To highlight representative applications of CE immunoassays.
• To discuss advancements in homogeneous and heterogeneous CE immunoassay techniques.

Main Methods:

• Review of homogeneous CE immunoassays (competitive and noncompetitive).
• Examination of heterogeneous CE immunoassays with immobilized components.
• Analysis of diverse detection modes including fluorescence, UV/Vis, chemiluminescence, electrochemical, MS, and SPR.

Main Results:

• Homogeneous methods involve solution-phase reactions, often using fluorescent or enzyme labels.
• Heterogeneous methods utilize solid-phase immobilization for analyte isolation or sample cleanup.
• CE immunoassays are adaptable to a wide range of detection techniques.

Conclusions:

• CE immunoassays represent a powerful tool for sensitive and selective analyte detection.
• The flexibility in assay format and detection mode allows for broad applicability.
• Further development in CE immunoassays promises enhanced analytical performance.