Journal
ANALYTICAL LETTERS
Volume 43, Issue 3, Pages 455-465Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032710903402374
Keywords
Carbohydrate antigen-125; Electrochemical immunoassay; Multifunctional magnetic beads; Poly(amidoamine) dendrimer
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Funding
- Scientific Research Fund of Sichuan Provincial Education Department [08zb001]
- Yibin University, China [2005Z14]
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The aim of this study is to develop a new potentiometric immunoassay for carbohydrate antigen-125 (CA125) in human serum by using poly(amidoamine) dendrimer-modified multifunctional magnetic beads conjugated with antibodies as immunosensing probes. With an external magnet, the developed immunosensor exhibited rapid potential response and wide linear range from 0.5 to 55 U/mL with a low detection limit of 0.1 U/mL CA125. The precision, selectivity, and stability of the developed immunosensor were acceptable. Analytical results obtained for the clinical serum specimen by the developed immunosensor were in accordance with those assayed by the enzyme-linked immunosorbent assay method.
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