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Gold bands as a suitable surface for enzyme immunoassays
Eva M Abad-Villar1, M Teresa Fernández-Abedul, Agustín Costa-García
1Departamento de Química Física y Analítica, Universidad de Oviedo, Oviedo, Asturias, Spain.
Biosensors & Bioelectronics
|August 23, 2002
Summary
This study developed a novel enzyme immunoassay using gold bands on Kapton for detecting human IgM. The assay achieved a detection limit of 50 ppb, demonstrating potential for sensitive diagnostic applications.
Area of Science:
- Biomaterials Science
- Analytical Chemistry
- Immunotechnology
Background:
- Enzyme immunoassays are crucial for detecting biomarkers.
- Developing sensitive and reproducible detection methods is essential.
- Gold-based materials offer unique properties for biosensing applications.
Purpose of the Study:
- To develop and validate a novel enzyme immunoassay using gold bands on Kapton for human IgM detection.
- To establish the analytical performance and reproducibility of the developed assay.
- To explore the potential for regeneration of the gold-based sensor.
Main Methods:
- Sputtering gold onto Kapton polymeric material to create sensor bands.
- Utilizing a non-competitive enzyme immunoassay design with anti-IgM conjugated to alkaline phosphatase (AP).
- Employing enzymatic hydrolysis of naphthylphosphate and subsequent oxidation for detection in a flow system.
Main Results:
- The assay successfully detected human IgM in the range of 0.05-5 ppm.
- A limit of detection (LOD) of 50 ppb was achieved for IgM.
- High reproducibility between sensor bands was observed (RSD=4%, n=5), with potential for regeneration.
Conclusions:
- Gold bands on Kapton are effective for enzyme immunoassay development.
- The developed assay provides sensitive and reproducible detection of human IgM.
- This approach holds promise for developing advanced biosensing platforms.