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Streptavidin-functionalized capillary immune microreactor for highly efficient chemiluminescent immunoassay
Zhanjun Yang1, Chen Zong, Huangxian Ju
1State Key Laboratory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, PR China.
Analytica Chimica Acta
|October 15, 2011
Summary
A novel streptavidin-functionalized capillary microreactor enables highly efficient flow-through chemiluminescent immunoassays. This cost-effective system offers a wider dynamic range and lower detection limits for rapid analysis.
Area of Science:
- Analytical Chemistry
- Biomedical Engineering
- Materials Science
Background:
- Conventional chemiluminescent (CL) immunoassays face limitations in efficiency and dynamic range.
- Developing microfluidic devices for rapid and sensitive immunoassays is crucial for diagnostics.
Purpose of the Study:
- To design and characterize a streptavidin-functionalized capillary immune microreactor for flow-through CL immunoassays.
- To evaluate the performance of the microreactor compared to traditional systems.
Main Methods:
- Fabrication of a capillary microreactor with a streptavidin-functionalized inner wall.
- Characterization using scanning electron microscopy (SEM).
- Development of a flow-through CL immunoassay using α-fetoprotein as a model analyte.
Main Results:
- The microreactor demonstrated efficient antibody immobilization and capture.
- Compared to conventional methods, it offered lower cost, simpler fabrication, and better practicality.
- The system achieved a wide linear range (0.5–200 ng mL⁻¹) and a low detection limit (0.1 ng mL⁻¹).
Conclusions:
- The streptavidin-functionalized capillary immune microreactor is a promising alternative for highly efficient flow-injection immunoassays.
- It overcomes limitations of conventional CL immunoreactors, offering improved performance and practicality.
